Differentiation Rules, Rates of Change, & Derivatives of Trig Functions - Lecture 9 (Calculus 1)

By the power rule, what is (d/dx)[x⁵]?

1. A.x⁴, dropping the exponent by one but losing the coefficient
2. B.5x⁵, keeping the original exponent as a new coefficient
3. C.5x⁶, raising the exponent and bringing it down too
4. D.5x⁴, bringing the exponent down and decrementing it by one