Answer:
D
Step-by-step explanation:
reminder on addition / subtraction
+ (- ) = - or - ( + ) = -
- ( - ) = +
(+) + ( +) = +
A
7 + (- 5) = 7 - 5 = 2 ← not negative
B
1 + (- 1) = 1 - 1 = 0 ← not negative
C
- 3 + 4 = 1 ← not negative
D
(- 3) + 2 = - 1 ← negative