A debit:

a. Multiple Choice Always increases an account.

b. Is the right-hand side of a T-account.

c. Always decreases an account.

d. Is the left-hand side of a T-account. Always increases liability accounts.

d. Is the left-hand side of a T-account.

Explanation:

In the T-accounts, the debits are on the left side while the credits are on the right.

A debit does not always increases an account. For example, a liability or an income account are usually credit balances as such, a debit to such account reduces the account balance.

Credits are always on the right side of a T-account.