The average daily calorie intake for an adult can vary based on factors like age, gender, activity level, and individual health goals. However, a general guideline suggests that:
- For women, the average daily calorie intake is about 1,800 to 2,400 calories.
- For men, it's generally around 2,200 to 3,000 calories.
Given these ranges, the best option from your list that aligns with average recommendations is:
D. 2,000
This number serves as a common benchmark, especially for general dietary planning.