Pretty sure it's [sarcastic] haven't checked for sure
It would better improve the paragraph because it has nothin to do with the rest of the paragraph. The paragraph seems to be about team sports and promoting it, while sentence 3 is about individual sports are better then team sports. So removing sentence three would better promote CO-ED team sports.
Romeo and Juliet should have followed Lawrence's plan because it would prevent any more trouble and they would stop having to sneak around everywhere to see each other.
C. do i have clear focus followed by relevant and intresting supporting details
Hope this helps