Final answer:
A credit entry decreases asset and expense accounts while increasing liability, common stock, and revenue accounts, which is option C.
Step-by-step explanation:
A credit entry is correctly described in option C: it decreases asset and expense accounts and increases liability, common stock, and revenue accounts. In accounting, the conventions of a T-account dictate that credits are recorded on the right side. This resonates with the structure of a bank's T-account, where liabilities and net worth are on the right side as well, balancing out the assets on the left side. The concept of a “T-account” helps visualize the fundamental accounting equation where assets equal liabilities plus net worth.