How Did the Calvinists Understand the Idea of Work or Labor

How did the Calvinists understand the idea of work or labor?

A) Work was the consequence of sin entering the world; it marked the shame of humankind.
B) Hard work, well done, was pleasing to God, and all work with a religious aspect was dignified.
C) Work marked the duty to which God called the unlearned, freeing the superior minds to contemplation.
D) Hard work was the duty of criminals and non-Christians so that Christians could pursue holiness.