Question

i was wondering if anyone could help me with this question


3. which of the following statements about earth’s atmosphere is true ? ( 1point )


A. earth’s atmosphere contains 78 percent water vapor , which is essential to life

b. earth’s atmosphere contains 21 percent oxygen

c. earth’s atmosphere contains carbon dioxide , which all life forms require

d. earth’s atmosphere allows radiation from the sun not pass though it and warm earth’s surface