I believe the activity that will best help prevent the common cold would be D. Covering a sneeze. This will prevent the cold from spreading possibly infecting other people.
This is known as congestive heart failure
Cigarettes can contain over 4000 chemicals. With that 4000, there are 43 cancer causing chemicals and 400 other toxins such as nicotine, tar, carbon monoxide, and much more.
I believe that it was the Hippocampus that was damaged.
