The performance report for taxi # 52 from Co. Teris Taxi Service is as follows:

Expenditure Current Budget Variant Wages $ 2,000 $ 1,800 $ 200 F Gasoline $ 300 $ 270 $ 30 F Maintenance $ 200 $ 400 $ 200 U Insurance $ 100 $ 110 $ 10 U Total $ 2,600 $ 2,580 $ 20 F

(U) Unfavorable (F) Favorable Based on this information, what is the possible reason (or reasons) for the variance in the driver's wages:

a.. A new driver was assigned to drive taxi # 52 on January 5, replacing one who retired after 30 years.

b. The taxi was undergoing maintenance and repairs for several days.

c. Business was slow, so taxi # 52 was stopped for 2 days.

d. All of the above may be possible reasons.