Choose the letter A, B, C or D to complete the passage below Hi. We are from

Choose the letter A, B, C or D to complete the passage below
Hi. We are from Neptune, the eighth planet from the Sun in the Solar System. Our planet is named (6) ___________ the Roman god of the sea. The climate here is very unfriendly, with a temperature of around -300 degrees Celsius, and the winds are very strong. Actually, we have a lot of storms here. Everything is freezing on the (7) ___________ of Neptune, so of course we don’t have liquid water. To be able to survive here, we have to build all of our cities underground, a hundred kilometers beneath the surface. Luckily, we don’t have Neptune-quakes!
Our life here is very different from your life on earth. Because it’s extremely (8) ___________ underground, we have a very good lighting system on round the clock. Every day, we need only three hours for sleep, four hours for work, and the rest of the day we (9) ___________ on our leisure activities. So life is relaxing. Most of us like traveling to other planets for new experiences. Although we are (10) ___________ than you in size, we can move very fast. In fact, we have wings, so we can fly. Thus, we don’t suffer heavy traffic like on your earth. We don’t have oxygen either, but we live on hydrogen.