What type of bond does Monique need to buy to manage Gretta's finances?

Monique needs to purchase a fiduciary bond to manage Gretta's finances because this type of bond is specifically designed to protect the interests of individuals whose assets are being managed by another party. A fiduciary bond ensures that the fiduciary—who, in this case, would be Monique—will act in good faith and in accordance with the law while managing Gretta's financial affairs.

Fiduciary bonds are commonly required in situations where someone has been appointed to manage the estate of another person, such as a guardian or trustee. These bonds provide a level of assurance that the fiduciary will uphold their duties responsibly and will not misuse the funds or assets entrusted to their care.

Other bond types, such as court bonds or contract bonds, serve different purposes. Court bonds are typically used to satisfy legal requirements in court proceedings, while contract bonds relate specifically to the fulfillment of contractual obligations. Finance bonds, while not typically recognized in the same context as the other bonds listed, may refer to various financial guarantees but do not fit the specific needs for managing someone's finances like a fiduciary bond does. Thus, the choice of a fiduciary bond is the most relevant and appropriate in this scenario.