Select the correct active form of the given sentence.
Pruning of trees in my colony has been started by the horticulture department.

A

Pruning of trees in my colony has started the horticulture department.

B

The horticulture department has been starting pruning of trees in my colony.

C

The horticulture department has started pruning of trees in my colony.

D

The horticulture department will start pruning of trees in my colony.