【单选题】My parents had to fulfill certain quotas: Several hundred garments--shirts, pants, and other clothing--had to be cleaned and pressed per day. By themselves, every day, they did an amount of work that ...
A.
My parents were working at a dry cleaner.
B.
My parents worked very hard at a dry cleaner, and they were quite skillful at cleaning and pressing garments.
C.
I could see in my parents' faces the grief and the hardship of working at a dry cleaner.