Which operation should be performed first according to the order of operations?
87 – 25 + 39 • 8 + 31 + 10
A.
31 + 10
B.
87 – 25
C.
25 + 39
D.
39 • 8
87 – 25 + 39 • 8 + 31 + 10
A.
31 + 10
B.
87 – 25
C.
25 + 39
D.
39 • 8