In the following questions, sentence/ a part of the sentence is bolded. Below are given alternatives to the `"bolded"` sentence/ a part of the sentence at (a),(b) and (c) which may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (d)
A little railroad engine `"was employed by a station yard"` for doing small pieces of work.

Options

A. was made by a station yard
B. was used at the station yard
C. was employed at the station yard
D. no improvement

Answer

B