Dahlia is simplifying (3t)^4 using these steps:

(3t)^4= 3t*3t*3t*3t=3*3*3*3*t*t*t*t


Although Dahlia is correct so far, which step could she have used instead to simplify the expression ?

A. 3t^4=3t^4
B.3^4t=81t
C. 4(3t)=12t
D.3^4t^4=81t^4