Solve the Equation by Completing the Square $$4 \mathrm {~d} ^ { 2 } + 16 \mathrm {~d} + 15 = 0$$

Multiple Choice

Solve the equation by completing the square.
- $$4 \mathrm {~d} ^ { 2 } + 16 \mathrm {~d} + 15 = 0$$

A) $- \frac { 5 } { 2 } , - \frac { 3 } { 2 }$
B) $- \frac { 2 } { 5 } , - \frac { 3 } { 2 }$
C) $\frac { 5 } { 2 } , \frac { 3 } { 2 }$
D) $\frac { 2 } { 5 } , \frac { 2 } { 3 }$