Which of the following is a true statement about functions? A.) If A and B are matrices, then AB can always be computed.
B.) If f is a function, then f(2+h)=f(2)+f(h)
C.) If f and g are functions, then (f+g)(-2)=(g+f)(-2)
D.) If f and g are functions, then (g o f) (x)=(f o g)(x)