Question

Read this sentence.Not only must a firefighter be strong, but he must be able to think on his feet.Which is the best way to write the sentence to take out the gender bias?
A.Not only must firefighters be strong, but they must be able to think on their feet. B.Not only must a firefighter be strong, but she must be able to think on her feet. C.Not only must a firefighter be strong, but they must be able to think on their feet. D.Not only must a firefighter be strong, but we must be able to think on our feet.

Answer 1

A is correct because it  isn't saying his or her and also its using correct grammar.