Could you pls check the grammar of the following sentence

Question

Many teenagers are determined to be policemen due to the mighty image of the policemen.

Answer 1

1. What if some of those teenagers are girls? How would you change that sentence?

2. How can you state these ideas without repeating any words?

Answer 2

Also ... check out #7 here:
http://grammar.ccc.commnet.edu/grammar/plague.htm