Anyone who works hard is called Diligent. Correct Answer: Option A. Option A is correct because 'Diligent' refers to someone who works hard and is attentive to their tasks. Option B (Negligent) is incorrect as it refers to carelessness. Option C (Short-lived) and Option D (Tame) are unrelated to the context of hard work. Note: The word 'Diligent' embodies a strong work ethic and is commonly used to praise industrious behavior.