The correct answer is A. It shows greater emotion, realism, and variety of poses.
Hellenistic sculpture is known for its dramatic expressions, dynamic poses, and realistic details, which represent a shift from the more idealized and restrained style of Classical sculpture. While elements of C may be present in Hellenistic art (such as variety in clothing), the defining characteristics of the Hellenistic period include heightened emotional expression and realism, making A the most accurate choice.