Question

CHECK OUT MY ATTACHMENT

Answer 1

I'm 100% sure that it is not "a"

Answer 2

I think its C @Hero

Answer 3

I can see why you would think that it is C, but that's not it either.

Answer 4

Here's something that will help:
http://www.mathopenref.com/constperpextpoint.html

Answer 5

Option D is the only one that has a chance of being correct.

Answer 6

That demonstration shows which one is correct.

Answer 7

thanks you guys