Factor Completely $4 a ^ { 2 } + 40 a + 100$

Multiple Choice

Factor completely. Check by multiplying the factors. $4 a ^ { 2 } + 40 a + 100$

A) $( 4 a - 5 ) ( a + 5 )$
B) $( 4 a - 5 ) ( 4 a + 5 )$
C) $4 ( a + 5 ) ( a + 5 )$
D) $( a + 5 ) ( a + 5 )$
E) $4 ( a - 5 ) ( a - 5 )$