Final answer:
Without knowing Mr. Henderson's initial online bank account balance, we cannot determine his balance after a $317.25 purchase. The correct answer from the provided choices is 'd. None of these' since we lack sufficient information to select options a, b, or c.
Step-by-step explanation:
The question relates to basic arithmetic operations and requires an understanding of how purchasing items affects a bank account balance.
To determine Mr. Henderson's online bank account balance after buying something for $317.25, we need to know his initial balance.
However, since the initial balance is not provided in the question, we cannot calculate the exact balance post-purchase.
Assuming Mr. Henderson had at least $317.25 in his account, his new balance would be his initial balance minus $317.25.
Without the initial balance, none of the choice options (a, b, or c) can be confirmed as correct because they are specific amounts, and we don't have the necessary information to validate them. Therefore, the correct answer from the given options would be d. None of these.