According to the article, WHY did so many workers live in the factory for 28 days?

A
They were offered more money if they stayed to make 40 million pounds of polypropylene.
B
The company asked the workers to commit extra time to help health care workers.
C
The workers were concerned that their families would distract them from their work.
D
The workers volunteered to live in the factory to ensure no one caught the virus.