On January 15th, a company receives cash for services to be performed on February 3rd. Which of the following correctly depicts what accounts will be debited and credited on January 15th?
a. Cash will be debited and service revenue will be credited
b. Cash will be credited and service revenue will be debited
c. Cash will be credited and unearned service revenue will be debited
d. Cash will be debited and unearned service revenue will be credited