I ate part of my little store of food and lay down to sleep, but all through the night the serpents crawled to and fro, hissing horribly, so that I could scarcely close my eyes for terror. I was thankful when the morning light appeared, and when I judged by the silence that the serpents had retreated to their dens I came tremblingly out of my cave and wandered up and down the valley once more, kicking the diamonds contemptuously out of my path, for I felt that they were indeed vain things to a man in my situation. At last, overcome with weariness, I sat down upon a rock, but I had hardly closed my eyes when I was startled by something which fell to the ground with a thud close beside me.
A thesis with a general topic (your answer is a) because then you break down your essay into more detail, using the topic sentence you created to describe what you would be talking about in your essay. Hope this helps.
