Renn' s grandmother shows her a dried-up well and tells her that 15-20 years ago there was water in the well, but now it has completely dried up. What could be the reason(s) for drying up of water in the well?
A. The soil around the trees, well and nearby area is now covered with cement.
B. A lot of boring pumps have come up in the nearby area.
C. Nobody uses the well as there are taps in everybody's house now.

Options

A. A and B
B. Only C
C. Only A
D. Only B

Answer

To analyze the reasons for the drying up of the well that Renn's grandmother showed her, we can evaluate each of the given statements one by one.

### Step-by-Step Solution:

1. **Evaluate Statement A**: "The soil around the trees, well, and nearby area is now covered with cement."
- When the soil is covered with cement, it prevents rainwater from being absorbed into the ground. This means that the groundwater levels are not replenished, leading to a decrease in the water levels in the well. Therefore, this statement is a valid reason for the drying up of the well.

2. **Evaluate Statement B**: "A lot of boring pumps have come up in the nearby area."
- Boring pumps extract groundwater from the aquifer. If many such pumps are used in the vicinity, they can significantly lower the groundwater levels. This excessive extraction can lead to the well drying up as the water is being drawn out faster than it can be replenished. Thus, this statement is also a valid reason for the drying up of the well.

3. **Evaluate Statement C**: "Nobody uses the well as there are taps in everybody's house now."
- While it is true that if people are not using the well, it might seem like it would not affect the water level. However, the lack of usage does not directly cause the well to dry up. The water level in the well is more affected by the groundwater recharge and extraction rather than the usage of the well itself. Therefore, this statement does not contribute to the drying up of the well.

### Conclusion:
Based on the evaluation:
- **Correct Reasons**: A and B are valid reasons for the drying up of the well.
- **Incorrect Reason**: C does not contribute to the drying up.

### Final Answer:
The reasons for the drying up of the well are:
- A. The soil around the trees, well, and nearby area is now covered with cement.
- B. A lot of boring pumps have come up in the nearby area.