The correct answer is B. Enthusiastic.
Eager is defined as “showing or feeling strong interest or eagerness.” Enthusiastic is defined as “showing or feeling great interest and excitement.” Both words describe a strong positive feeling about something.
Clever is defined as “having or showing a quick wit and a ready ability to learn and understand things.” Curious is defined as “having or showing a keen interest in or desire to learn or know something.” Devoted is defined as “showing great care and attention to someone or something.” While these words can be positive, they do not necessarily describe a strong positive feeling about something.
For example, someone might be clever at solving puzzles, but they might not be enthusiastic about it. Someone might be curious about the world around them, but they might not be devoted to learning everything they can about it.
In contrast, someone who is eager to learn something is likely to be enthusiastic about it and to devote a lot of time and energy to it.