If ( ∫₋₁₄¹⁴ f(x) , dx = 8 ) and ( ∫₋₁₄¹⁴ g(x) , dx = -2 ), which of the following cannot be determined from the information given?
a. ( ∫₋₁₄¹⁴ [f(x) + g(x)] , dx )
b. ( ∫₋₁₄¹⁴ [2f(x)] , dx )
c. ( ∫₋₂₈²⁸ f(x) , dx )
d. ( ∫₋₁₄⁰ f(x) , dx )