If a is a positive integer, then 2^a + 2^(a + 1)+ 2^(a + 2)+ 2^(a + 3)+ 2^(a + 4)+ 2^(a + 5) =	Select:
A) 3^(a + 1)  B) 2^(a + 1)  C) 2a  D) 2a^(a + 1)  E) 63(2^a)
If a is a positive integer, then 2^a + 2^(a + 1)+ 2^(a + 2)+ 2^(a + 3)+ 2^(a + 4)+ 2^(a + 5) =   2^a(1+2+4+8+16+32)   2^a(63)   E. 63(2^a)
<result>E</result>
If a is a positive integer, then 2^a + 2^(a + 1)+ 2^(a + 2)+ 2^(a + 3)+ 2^(a + 4)+ 2^(a + 5) =