Answer:
Based on the given equation for earnings on a checking account, we can substitute the given values to find the customer's earnings for the month if her minimum balance is $2,000.00:
I = rB - sx - f
I = 0.0095($2,000.00) - 0(28) - $4.00
I = $19.00 - $4.00
I = $15.00
Therefore, the customer's earnings for the month if her minimum balance is $2,000.00 is $15.00. Option C is the correct answer.