Find the First Five Terms of the Geometric Sequence $a _ { 1 } = 4 , r = 2 x$

Multiple Choice

Find the first five terms of the geometric sequence. $a _ { 1 } = 4 , r = 2 x$

A) $4,2 x , 2 x ^ { 2 } , 2 x ^ { 3 } , 2 x ^ { 4 }$
B) $4,8 x , 16 x ^ { 2 } , 32 x ^ { 3 } , 64 x ^ { 4 }$
C) $4,2 x ^ { 2 } , 2 x ^ { 3 } , 2 x ^ { 4 } , 2 x ^ { 5 }$
D) $4,8 x ^ { 2 } , 16 x ^ { 3 } , 32 x ^ { 4 } , 64 x ^ { 5 }$
E) $4 , x ^ { 2 } , x ^ { 3 } , x ^ { 4 } , x ^ { 5 }$