What is the sum of (1.3 × 10-7) and (-3.8 × 10-3)?
A2.5 × 10-10
B-2.5 × 10-4
C3.8 × 10-3
D-3.8 × 10-3
A2.5 × 10-10
B-2.5 × 10-4
C3.8 × 10-3
D-3.8 × 10-3