Help pless!!!!!
Brainliest to the best answer

Answer:
a) 15 + 7 - 5 = 17 discard
b) 15 + 7 - 5 = 17 discard
c) 15 + 2 = 17 discard
d) 3 (12) - 5 = 36 - 5 = 31
answer is option d
edit : brainliest ??