Which is the hypothesis of this statement? 
 If a and b are negative, then a + b is negative. 
 A. If a and b are negative, then a + b is negative. 
 B. If a + b is negative, then a and b is negative. 
 C. a and b are negative. <---
 D. a + b is negative.
 Because D is the conclusion, and that's the only part left. I don't have a better explanation, I'm sorry, I can't really explain why I think that's the answer. :)