Which is a good way to care for your eyes and keep them healthy?

a.
read, watch television, or use the computer in a well-lit room.

b.
wear sunglasses when you are outdoors.

c.
if a foreign object enters your eye, rinse with cool, clear water.

d.
all of the above.

Which of the following statements concerning cancer and mutations is correct? a: cancer can only occur with a mutation in a somatic cell. b: usually, multiple mutations are required in different genes to cause cancer. c: none of the other answer options is correct. d: cancer can only occur with a mutation in a germ cell. e: usually, a single mutation is all that is required to cause cancer.