Answer:
The answer is indeed letter D. Backpacking solo across a continent is quite risky, so it helps to have company.
Step-by-step explanation:
The author of this passage sees backpacking as fun way to travel when one does not have much money. He/she explains that there are those who backpack in groups, and those who do it by themselves. The author does not attack the idea of backpacking by oneself. He/she simply makes it clear as to why it can be tricky: it could be dangerous; the person can only count on him/herself to solve any possible problems; if the person does not speak the local language, the trip becomes more challenging. If one travels accompanied by a group of people, chances are that problems will be more easily solved. The groups can pool their money to help in a difficult situation; someone might know the local language and help the others; more thinking heads, so more ideas available. If we are, thus, to summarize this passage's point of view, it should be letter D. Backpacking solo across a continent is quite risky, so it helps to have company.