Answer:
d. All of these answer choices are correct.
Step-by-step explanation:
Considering all the options;
a. an amount could be entered in the wrong account. - This is true as a transaction that should have been recorded into the asset account could be erroneously recorded as an expense or vice versa. The same applies to expenses and liabilities
b. a transaction could have been entered twice. - This is true. If a transaction is entered twice correctly, the debits would equal the credits
c. a transaction could have been omitted. - this is true. The omission will not result in unequal debits and credits.
Hence the answer is d. All of these answer choices are correct.