Industrial Engineering | MCQs

Explanation

Are employed' is in the simple present tense, in passive voice.

It presents the state of 'five hundred people there" 

"Big" is best to keep the meaning of the original tense because in the above sentence " five hundred is a huge number of employees"

so the 500 employees only work in a big factory

Hence the option C is correct here

ND13-07-2023