Which FOUR combinations could possibly have resulted in this situation?

Refer to the Exhibit.

A company operates an absorption costing system. The management accounts show that fixed production overheads were over-absorbed in the period.

Which FOUR combinations could possibly have resulted in this situation?
A . Combination A
B . Combination B
C . Combination C
D . Combination D
E . Combination E
F . Combination F
G . Combination G
H . Combination H

Answer: C,D,E,F