rolling grass is

Options

A. agropyron
B. ammophila
C. poa
D. all the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Rolling Grasses":**
- Rolling grasses are specific types of grasses that are commonly used for lawns and have the ability to spread and cover ground effectively.

2. **Identifying the Options:**
- The options provided are:
- a) Agropyron
- b) Ammophila
- c) Poa
- d) All of the above

3. **Analyzing Each Option:**
- **Agropyron:** This is a genus of grasses known for their adaptability and use in lawns.
- **Ammophila:** This genus is also known for its use in sandy areas and is effective in stabilizing soil, making it suitable for lawns.
- **Poa:** This is another genus of grasses that includes species commonly used in lawns due to their fine texture and lush appearance.

4. **Conclusion:**
- Since all three options (Agropyron, Ammophila, and Poa) are recognized as rolling grasses and are used in lawn making, the correct answer is:
- **d) All of the above.**