Which word means serving as a means or influence; helpful?

Which word means serving as a means or influence; helpful?

• A. Useful
• B. Instrumental
• C. Beneficial
• D. Advantageous

Answer: (B)

Instrumental means acting as a means to an end or playing a key role in bringing about a result. It signals that something functions as a tool or influence that helps achieve something. For example, a discovery can be instrumental in changing policy, meaning it directly helped make that change possible. Useful is more about practicality in general without implying a specific role as a means; beneficial and advantageous describe positive effects, but not the sense of serving as a tool or influence to cause an outcome. Thus, instrumental is the best fit for "serving as a means or influence; helpful."

Instrumental means acting as a means to an end or playing a key role in bringing about a result. It signals that something functions as a tool or influence that helps achieve something. For example, a discovery can be instrumental in changing policy, meaning it directly helped make that change possible. Useful is more about practicality in general without implying a specific role as a means; beneficial and advantageous describe positive effects, but not the sense of serving as a tool or influence to cause an outcome. Thus, instrumental is the best fit for "serving as a means or influence; helpful."