WAEC Geography 1999 Question 27

Use the information in the table below (Station Z).
Month: J, F, M, A, M, J, J, A, S, O, N, D
Temp (°C): 21, 24, 26, 32, 31, 29, 27, 25, 27, 27, 26, 35
Precipitation (mm): 0, 0, 3, 13, 71, 121, 211, 302, 138, 12, 0, 0
What is the mean monthly temperature of Station Z?

1. A.25°C
2. B.27.5°C
3. C.28.5°C
4. D.33°C