Present Perfect: This is confusing in Functions

Hello,
I have been working on my assignment, and these questions have been troubling me. I was wondering, if anyone could just have a look at my answers and rational, to let me know where my mistakes lie.

Thanks for the help.

*My answers will be posted in bold and italic. I've tried to explain my reason for the answers.

Available answers: -

The present perfect is the most commonly used perfect tense construction in the English language. Although it has many functions we will deal primarily with just four.


A. It describes a state, event or habit that started in the past, and continues to the present and may continue into the future. For example:

• I have lived in this house for six years.
  
  

B. It describes an event which was completed sometime in the past, but which has some significance to the present. For example:

• I’m not hungry just now. I’ve just eaten.
  
  

C. It describes an experience you had in the past which you remember clearly. For example:

• I have done a bungee jump.
  
  

D. We use the present perfect form to check that something has been done or completed. For example:

• Have you finished the washing up yet?

The Question

• I have performed on the piano six times in my life. - C ( This is because the action can be clearly counted as 6. But this could also be 'A,'because the action is not limited to just 6 and will continue.) - I think the answer is C
  
• Amy has been divorced for a few years now. - A or B (A - This is the current state, she is divorced and the situation is likely to continue into the future, but could change. B - As it is an event that has taken place in her past and has a consequence in her present state) - I think the answer is A
  
• Catherine has been out with many boyfriends in her life. A or B (A - as it describes the current state of Catherine past til present, which can change in the future. B- as Catherine has had 6 boyfriends in th past, which has a significance to her in the present) - I think the answer is B
  

• Mark has made a complete fool out of himself many times. - B or C (B - As this sounds to me like Mark's past actions have become a topic of conversation, which has some consequence in the present. But it could also be 'C' - As this person has experienced Mark's past actions and clearly remember it. ) - I think the answer is B
  

• I’ve forgotten my keys again. - B or C ( B - as the person has forgotten their keys, so there is a current consequence. C - This is an action that is clearly remembered from the previous experience.) - I think the answer is C
  

• Mark has done many stupid things in his life. - B or C (B - Mark has acted this was in the past, which has given him a reputation presently. C - The person talking can clearly remember many instances where Mark has been stupid.) - I think the answer is B