What is the simpler form of the radical expression? 4sqrt 2401x^12y^16

Question

I think the answer is either C or D.

A. 49|x^9|y^16
B. 49x^9|y^16|
C. 7|x^3|y^4
D. 7x^3|y^4|

Answer 1

as you typed it:
4√2401 x^12 y^16
= 4(49) x^12 y^16 , none of the choices

if you meant:
4√(2401 x^12 y^16)
= 4(49) x^6 y^8 , again none of the choices

if you meant:
(2401 x^12 y^16)^(1/4)
= 7 x^3 y^4 , then you shouldn't have used sqrt

Answer 2

What is the answer then!?

Answer 3

the answer should be
D. 7x^3|y^4|