Which word best describes a task that is "arduous"?

• A. Simple and easy
• B. Exciting and enjoyable
• C. Involving or requiring strenuous effort; difficult
• D. Common and routine

Answer: (C)

The word "arduous" describes a task that requires significant effort, is challenging, and often physically or mentally exhausting to complete. When something is labeled as arduous, it signifies that the task demands perseverance and hard work, making "involving or requiring strenuous effort; difficult" the most fitting description. This aligns with the common understanding of the term, which is frequently associated with labor-intensive or tough responsibilities that may test one’s endurance or capabilities.

In contrast, the other descriptions do not capture the challenging nature of an arduous task. Tasks that are deemed "simple and easy" suggest minimal effort is required, while "exciting and enjoyable" conveys a sense of pleasure rather than difficulty. Similarly, "common and routine" implies that the task is straightforward and familiar, lacking the strenuous nature associated with arduous undertakings. Therefore, the correct answer reflects the essence of what it means for a task to be arduous.