Let F be an antiderivative of the continuous function f with F(0)=2. Assume f(x)<0 for 0<x<4 and f(x)>0 for 4<x<7. Which of the following statements must be true?
(a) F(7)=F(4)
(b) The relationship between F(7) and F(4) cannot be determined
(c) F(7)>F(4)
(d) F(7)<F(4)