Find the Product and Write the Result in Standard Form $$( - 9 - 6 i ) ( 5 + i )$$

Multiple Choice

Find the product and write the result in standard form.
- $$( - 9 - 6 i ) ( 5 + i )$$

A) $- 39 - 39 \mathrm { i }$
B) $- 51 - 39 \mathrm { i }$
C) $- 39 + 21 \mathrm { i }$
D) $- 51 + 21 \mathrm { i }$