18 +POINTS!! Please help ASAP

Ken predicts that the average temperature will be −5°C in December. If he predicts the temperature will rise 6°C in January and fall 3°C in February, which of the following equations can he use to find the sum of the temperatures for those months? CHECK ALL THAT APPLY!

A. [6 + 3] + 5 = 14

B. (–5) + [3 + 6] = –4

C. [(–5) + (–3)] + 6 = –2

D. 5 + [(–6) + (–3)] = –4

E. [6 + (–5)] + (–3) = –2

F. [(–5) + 6 ] + (–3) = 4