The correct answer is (B) annoyance; irritation; vexing; being vexed. Also, that which vexes or annoys.

Vexation comes from Latin vexationem, vexatio, vexare (to vex).

Examples of use:

• The congested traffic on the expressway each day was a vexation.
• His supervisor's inability to make decisions was another vexation in his life.