What is a common synonym for "expedient"?

The term "expedient" refers to something that is convenient and practical, although possibly improper or immoral. When considering the choices provided, "beneficial" aligns closely with this definition. Both words connote a sense of being advantageous and helpful in achieving a desired outcome. In situations where a solution is sought, an expedient option is typically one that provides a quick and effective means to resolve an issue, much like something that is beneficial.

The other choices do not match the meaning of "expedient." "Obstructive" indicates something that hinders or prevents progress, which is the opposite of being expedient. "Ambiguous" refers to something that is unclear or open to interpretation, and "complex" signifies something that is intricate and complicated, lacking the straightforwardness often associated with expedience. Thus, "beneficial" is the most fitting synonym for "expedient."