Because it is The importance of representative samplesand how to get them. For most market research surveys it is impractical, in terms of time, budget and other factors, to interview everyone in your targetpopulation. ... As far as possible thesample of people interviewed should berepresentative of the targetpopulation.
Answer:
4th one
Explanation:
A semicolon is a replacement for a period or a comma, which does not make too much sense because it is introducing what the grandmother said.
If you put the semicolon between me and sound, it breaks the sentence in two. It's also the case if you use a colon.
The man typroping across the grand canyon has nerves of steel.