An online security firm and a research firm conducted a telephone survey in October 2012 and found that 40% of people from a specific country admit they don't always understand text message abbreviations they receive. The firms surveyed 500 adults from that country.
Assuming that this was a simple random sampling, can you be comfortable that 40% is a good estimate of the percentage of adults
from that country who don't always understand text messages?

A. No. Telephone surveys are never accurate.
B. Yes. As long as the question asked was free of bias, you can trust the results.
C. Yes. A simple random sample always gives more accurate results than other methods of sampling.
D. No. Younger adults probably understand more text abbreviations than older adults. We would be more
confident in the results of a sample that was stratified according to age.