Grady's action of changing the transaction amount after learning a report will be filed is a clear red flag for suspicious activity. This behavior suggests manipulation to avoid detection of potentially illicit actions. In contrast, the other options reflect normal banking practices without indication of suspicious intent. ;
The chosen option indicating a red flag for suspicious activity is B, where Grady changes the transaction amount after being informed that a report will be filed. This behavior suggests an attempt to evade detection, which is characteristic of suspicious actions. The other options reflect normal banking practices without any signs of deceit.
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