A Company Paid $3900 for Supplies That Were Purchased Earlier

A company paid $3900 for supplies that were purchased earlier in the month on account. How does this transaction affect the accounting equation?

A) Add $3900 to Supplies and add $3900 to Supplies Expense.
B) Add $3900 to Supplies Expense and subtract $3900 from Cash.
C) Add $3900 to Supplies Expense and add $3900 to Cash.
D) Subtract $3900 from Accounts Payable and subtract $3900 from Cash.