Final answer:
Dual control would likely be used in conjunction with trust assets held in the vault as a security measure to prevent unauthorized access or misuse. The correct option is (d).
Step-by-step explanation:
The control that would likely be used in conjunction with trust assets held in the vault is dual control.
Dual control is a security measure where two or more individuals are required to work together to access or handle sensitive assets such as cash, securities, or valuable items.
For example, in a bank setting, one employee may have access to the vault while another employee has the combination or key. Both employees must be present and actively involved in any transactions involving trust assets from the vault.
This control helps to prevent unauthorized access or misuse of the assets and provides an extra layer of security and accountability.