TOPIC SENTENCES

Hello, I hope I get help with correcting this exercise...

Thank you!

Exercise 1: Identify the good topic sentences in the following examples and EXPLAIN:

A- Everybody loves pizzas.

B- Through pizza has its roots in Italy, this much-loved fast food has become a true world traveler

C- It is estimated that 5 billion pizzas are bought worldwide each year.

My own correction :

Exercise 3:

The first sentence is too general so it can not be a good topic sentence.

The 2nd is a good topic sentence because it is clear and precise

The third is too specific for a good topic sentence.