Frank Carpenter, who runs a charity organization, has been faking his father's signature on his father's personal checks and writing them in favor of the charity as donations. After faking the signature, Frank gives the checks to Rhonda Mason, the charity bookkeeper, to deposit in the bank. Though Frank doesn't know it$,$ Rhonda routes some of the check money into her own savings account. Through a series of events, Frank's father realizes that Frank has been swindling him of his money, and the charity itself is being swindled by someone else from within. In this scenario, which of the following crimes has Rhonda Mason committed?

forgery

extortion

bribery

embezzlement