Would the following be suitable questions and answers?

Hi teachers,
This is for a listening comprehension exercise. The text is from a CD. (The Elephant Man)
Context:
I did not see Merrick again for two years. Then, one day, the police found him. He had my card in his hand, so they brought him to the London Hospital.
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Assuming that we know that 'my card' is the 'doctor's card', would the following be suitable questions and answers?
a) When did the doctor see Merrick again? After two years.
b) How come did the doctor see Merrick again? Because the police found him and brought him to the London Hospital.
c) Why did the police bring Merrick to the London hospital? Because he had the doctor’s card in his hand.

Thanks in advance.