If f(x)=7x²−3 and g(x)=5x, which expression is equivalent to [g∘f](2)?

a. (5⋅2)(7(2)²−3)
b. 5(7⋅2²−3)
c. 7(5⋅2)²−3
d. 7(2)²
e. 5⋅2−3