Weight lifters are often required to more muscle mass and body mass. this purpose, they need to take a that is full of ......

Options

A. Carbohydrates
B. Fat
C. Vitamin
D. Protein

Explanation

**Step-by-Step Solution:**

1. **Understanding the Requirement**: Weight lifters aim to increase both muscle mass and body mass. This requires a specific dietary approach to support their training and muscle growth.

2. **Identifying Nutritional Needs**: To achieve increased muscle mass, weight lifters need to focus on a diet that is rich in certain nutrients. The primary nutrient for muscle growth is protein.

3. **Importance of Protein**: Protein is essential for the growth and repair of muscle tissues. It provides the necessary amino acids that are the building blocks for muscle development.

4. **Role of Other Nutrients**: While protein is crucial, carbohydrates also play a role by providing immediate energy needed for workouts. Fats are important for long-term energy storage, and vitamins are necessary for overall body functioning.

5. **Conclusion**: Therefore, for weight lifters aiming to increase muscle mass and body mass, a diet that is full of **protein** is essential.

**Final Answer**: Weight lifters need to take a diet that is full of **protein**.

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