A Municipality's Central Garage Internal Service Fund Had Total Billings

A municipality's Central Garage Internal Service Fund had total billings for $8,000 for the month. Of the 40 vehicles serviced, 20 were police vehicles, 10 were water department vehicles, and 10 were wastewater department vehicles. What would the journal entry be to account for this transaction? $\begin{array}{llr}&&\text { Debit }&\text {Credit }\\ \text { A. } & \text { Accounts Receivable } &\$8,000\\& \text { Transfer from Other Funds } &&\$8,000\\\\ \text {B. } & \text { Accounts Receivable } &\$8,000\\ &\text { Revenues-Charges for Services. } &&\$8,000\\\\ \text { C. } & \text {Due from General Fund } &\$4,000\\& \text { Due from Water Fund} &2,000\\& \text { Due from Wastewater Fund } &2,000\\& \text {Revenues-Charges for Services } &&\$8,000\\\\ \text {D. } & \text { Due from General Fund } &\$4,000\\& \text {Due from Water Fund } &2,000\\& \text { Due from Wastewater Fund} &2,000\\& \text {Transfer from Other Funds } &&\$8,000\\\end{array}$