Final answer:
The correct answer is $5,325 (not one of the given options). The amount of outstanding checks at the end of December is $5,325.
Step-by-step explanation:
The amount of outstanding checks at the end of December can be calculated by subtracting the checks presented for payment in December from the checks written in December. So, the outstanding checks at the end of December can be calculated as:
$37,974 - $32,649 = $5,325
Therefore, the correct answer is $5,325 (not one of the given options).