Answer:
Mars net income for January is A. $7,500
Explanation:
Following the Accrual accounting - an accounting method that revenue or expenses are recorded when a transaction occurs rather than when payment is received or made, in January:
Revenue of Mars Corp. was $10,000 and expense was $2,500. It does not depend on when the company received or made the payment.
Net income = Revenue - expense = $10,000 - $2,500 = $7,500