What is military differential pay? Select one: 

a. Differential pay is the additional wages that active duty military personnel receive when serving in a combat zone 

b. Differential pay is any payment made by an employer to an individual for a period during which the individual is performing service in the uniformed services while on active duty for a period of more than 30 days and represents all or a portion of the wages the individual would have received from the employer if the individual were performing services for the employer 

c. Differential pay is any payment made by an employer to an individual for a period during which the individual is performing service for the employer while on temporary leave from active duty for a period of 30 days or less 

d. Differential pay is wages earned by civilians performing services for an employer in an active combat zone