For a Worker,the Opportunity Cost of an Hour of Leisure

For a worker,the opportunity cost of an hour of leisure

A) rises by $5 when her wage rises by $5 per hour.
B) falls by $5 when her wage rises by $5 per hour.
C) is the same for a corporate chief executive officer as it is for a garbage-collection worker.
D) is determined by factors that are unrelated to her hourly wage.