Final answer:
The buyer pays $85,000 at closing.
Step-by-step explanation:
To determine how much the buyer pays at closing, we need to calculate the remaining amount after the initial deposit and the additional payment.
The buyer paid 5% of the property's selling price as a good faith deposit, which is $100,000 x 0.05 = $5,000.
The buyer then made an additional payment of $10,000, making the total amount paid so far $5,000 + $10,000 = $15,000.
To find out how much the buyer pays at closing, we subtract this total amount from the property's selling price: $100,000 - $15,000 = $85,000.
Therefore, the correct answer is 4) $85,000.