Answer:
(D) $300
Step-by-step explanation:
Is not clear if Jennifer get an income during the month but asuming that the only financial transaction was the declined in the worth, we can assure that she paid something for $300, it says "no other financial activities".
What is clear it's that she had a net worth of $3.000 because of the last month's income, so a decline denote that she paid something with the money earned in the past and not with a currrent income.