Add or Subtract as Indicated and Write the Result in Standard

Multiple Choice

Add or subtract as indicated and write the result in standard form.
- $( 5 - 4 i ) + ( 2 + 6 i )$

A) $7 + 2 i$
B) $7 - 2 i$
C) $3 + 10 \mathrm { i }$
D) $- 7 - 2 \mathrm { i }$