Answer: B) Yes, especially if the people who are on a do dash not dash call registry have a trait that is not accurately represented by the remaining people in the sample
If the person conducting the survey wants a good random sample then they should take opinions from a broad audience, including people from different backgrounds, races, ages, cultures etc. In this case, the people that are not on the call registry most likely have a common trait that would explain why they're not in there (ie. they're too young to be eligible to be in the call registry, they are too old to be on the call registry, etc). Not calling them then would throw off the sample. Because of this, B is the correct answer.
Answer:
D.Age
Because you usually hang out with people around your age.
The first step to getting time on your side is the ask nicely
It pollutes the air and can get people killed by cave in's.
