Final answer:
Remote wipe is the most likely solution to prevent a future breach in similar cases.
Step-by-step explanation:
The most likely option to prevent a similar breach in the future is Remote wipe. Remote wipe allows the company to erase all data from a mobile device remotely in case of loss or theft. In this case, if the board secretary's mobile device had remote wipe enabled, the sensitive financial information would not have been available to the attacker. Other options such as FDE (Full Disk Encryption) and VPN (Virtual Private Network) can also provide additional layers of security, but they may not directly address the breach that occurred.