An example of a difficult work decision would be:
a. deciding to finish a task before taking a break
b. deciding to fill the paper tray when it is out of paper
c. deciding to relocate in order to gain a promotion
d. deciding to tell your boss about a faulty stapler in the work room

c. Deciding to relocate in order to gain a promotion

Explanation:

A difficult work decision is a decision that can both benefit you and affect you, in this case you could win a promotion both in the other hand you´d have to relocate and leave the city where you are currently living, this is a difficult work decision, the other options aren´t really difficult since they do not have as much of a sacrifice as this one.

c. Deciding to relocate in order to gain a promotion

Explanation:

A difficult work decision is a decision that can both benefit you and affect you, in this case you could win a promotion both in the other hand you´d have to relocate and leave the city where you are currently living, this is a difficult work decision, the other options aren´t really difficult since they do not have as much of a sacrifice as this one.

c. explains words’ origins and variations.

the second sentence is a great revision in my opinion. that would be a great topic.

explanation: