What Is the Value Of $\int_{a}^{c}|f(x)| d x$ If the Area of a = 9 and the Area

What is the value of $\int_{a}^{c}|f(x) | d x$ if the area of A = 9 and the area of B = -2?

A) 3.5
B) 14
C) -7
D) 7
E) 11