Introduction:
In the given question, the correct answer is option 'C', which states that the grandmother accompanied the author to his school because of the temple attached to the school. Let's understand the reasoning behind this answer.

Explanation:
The author mentions in the passage that his school was attached to a temple. This implies that the school and the temple were located in close proximity to each other, possibly sharing the same premises. Therefore, it can be inferred that the grandmother accompanied the author to his school because of the temple attached to it. Here's a detailed explanation of why she might have done so:

1. Religious Beliefs:
The grandmother may have had strong religious beliefs and considered visiting the temple an important part of her daily routine. By accompanying the author to his school, she could conveniently visit the temple and fulfill her religious obligations or seek blessings from the deities. This would save her time and effort of making a separate trip to the temple.

2. Spiritual Connection:
The grandmother may have had a deep spiritual connection with the temple. She might have found solace, peace, and a sense of belonging in the temple's serene atmosphere. By accompanying the author to his school, she could spend some time in the temple, meditate, or engage in prayers, which would help her maintain her spiritual well-being.

3. Cultural Significance:
The temple attached to the school could have held significant cultural importance for the grandmother and the community. It might have been a place of cultural gatherings, celebrations, or festivals. By accompanying the author to his school, the grandmother could participate in these cultural activities and maintain her connection with the traditions and customs of her community.

4. Social Interaction:
The temple attached to the school could have been a meeting place for the villagers, where they would gather to socialize, exchange news, and strengthen community bonds. By accompanying the author to his school, the grandmother could have the opportunity to meet and interact with other villagers, fostering a sense of belonging and camaraderie.

Conclusion:
In conclusion, the grandmother accompanied the author to his school because of the temple attached to it. This decision could be driven by religious beliefs, spiritual connection, cultural significance, and the desire for social interaction.