Simplify the expression below. Assume all variables are nonnegative real numbers.:

Simplify the expression below. Assume all variables are nonnegative real numbers.:

Simplify the expression below. Assume all variables are nonnegative real numbers.:

cube root of negative 27 r to the power of 6 end root

A. negative 3 r squared

B. 3 open vertical bar r squared close vertical bar

C. No real answer

D. negative 3 r cubed