Answer:
B : an entry on the left side of an account.
Explanation:
There are two terms i.e debit and credit.
The accounts that reported as an expense, losses, assets are recorded in the left-hand side of an account as it contains the debit balance.
While the account reported as a revenue, gains, liabilities & stockholder equity are recorded in the right-hand side of an account as it contains the credit balance.
Standard Oil
This was an American oil company that was into everything oil from refining to even the transportation, It was set up in 1870 by John D. Rockefeller as an organisation in the state of Ohio, it was the biggest oil refinery both home and abroad as at that time.