It was already late when we set out for the next town, which according to the map was about fifteen kilometers away on the other side of the hills. There we felt that we would find a bed for the night. Darkness fell soon after we left the village, but luckily we met no one as we drove swiftly along the narrow winding road that led to the hills. As we climbed higher, it became colder and rain began to fall, making it difficult at times to see the road. I asked John, my companion, to drive more slowly. After we had travelled for about twenty kilometers, there was still no sign of the town which was marked on the map. We were beginning to get worried. Then without warning, the car stopped and we found we had run Out of petrol.
The author asked John to drive more slowly because
The passage explicitly states, "As we climbed higher, it became colder and rain began to fall, making it difficult at times to see the road. I asked John, my companion, to drive more slowly." This directly indicates that the reduced visibility due to adverse weather conditions (rain and darkness) was the reason the author requested John to drive more slowly.
1) The road led to the hills: While the narrative mentions the road leading to the hills, this fact alone is not presented as the reason for the request to slow down. The difficulty in seeing the road due to rain is the immediate cause cited.
2) John was an inexperienced driver: The passage provides no information regarding John's driving experience. This option introduces an assumption not supported by the text.
4) They were in wilderness: Although the setting implies a remote area, the author's request to slow down is specifically attributed to the difficulty in seeing the road, not the general wilderness condition.