Do people who fly more often in commerical airplanes catch more colds than people who do not fly very often? Decide if this a census or sample. Justify your answer.
A) Census. There are too many people who fly.
B)Sample. There are too many people who fly.
C)Census. It's pretty easy to survey all the people who fly.
D)Sample. It's pretty easy to survey all the people who fly.
