_____is the vaginal bleeding that occurs in adolescent girls and women as a result of hormonal changes.

Options

A. Menarche
B. Menopause
C. Menstruation
D. None of these

Explanation

The answer to the question "_____ is the vaginal bleeding that occurs in adolescent girls and women as a result of hormonal changes" is **Menstruation**.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a term that describes vaginal bleeding in adolescent girls and women due to hormonal changes.

2. **Identifying Key Terms**: The key terms in the question are "vaginal bleeding," "adolescent girls," "women," and "hormonal changes."

3. **Analyzing the Options**:
- **Option 1: Menarche** - This refers to the first occurrence of menstruation, not the process itself.
- **Option 2: Menopause** - This is the time in a woman's life when menstrual periods permanently stop, which is the opposite of what the question describes.
- **Option 3: Menstruation** - This term refers to the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina, which occurs as a result of hormonal changes in the body.
- **Option 4: None of these** - This option is incorrect as we have identified the correct term.

4. **Selecting the Correct Answer**: Based on the analysis, the correct answer is **Menstruation** as it directly relates to the vaginal bleeding that occurs in adolescent girls and women due to hormonal changes.

### Final Answer:
**Menstruation**