Perform the Indicated Operation $( 3 a - 2 ) \left( 5 a ^ { 2 } - 3 a - 7 \right)$

Multiple Choice

Perform the indicated operation: $( 3 a - 2 ) \left( 5 a ^ { 2 } - 3 a - 7 \right)$

A) $15 a ^ { 3 } - 19 a ^ { 2 } - 27 a - 14$
B) $15 a ^ { 3 } - 19 a ^ { 2 } + 15 a + 14$
C) none of these
D) $15 a ^ { 3 } - 19 a ^ { 2 } - 15 a + 14$