Directions: The first and the last sentences of the following passage are numbered 1 and 6, respectively. The rest of the passage is split into four parts, namely A, B, C and D. These four parts are not given in their proper order. Read the sentences and find out which of the following combinations is correct.

1. The pineal gland, among other things, regulates the melatonin in the body and when it is overstimulated, like when you stare at a computer screen all day, the melatonin in your body is suppressed and your sleep and rest periods will automatically be more difficult. A. So basically, when you stare at a computer screen all day, particularly at night, your body is going to think you are a 90 year old man. B. They do not need less sleep, as is commonly thought, but they get less quality sleep because the pineal gland calcifies and less melatonin is produced in the body, resulting in less sleep as well as more age-related diseases such as cancer. C. The pineal gland stops functioning well as we age, which is why older people get less sleep. D. You would not get into a deep sleep, for instance, or you will wake up at 3 in the morning, anxious about all the things you have to do and the cycle repeats.
2. When you are a 90 year old man, not only is it harder for you to get sleep, but it is harder for you to get basic tasks done, so you have to stay at the computer screen longer.