Answer:
B
Step-by-step explanation:
Complementary angles are angles which complement one another, which means that it is two angles which sizes add up to 90°.
In the figure shown, there is only one 90° angle, ∠DVF.
The two angles that sum up to be 90° in the diagram, are ∠DVE and ∠EVF, which means that they are complementary.
