Capturing the opinions of only those who visit specific websites is an example of what?

A) Sampling bias
B) Leading questions
C) Validity
D) Representative samples
E) In-depth interviews

Answer: A
Explanation: A) The online surveys you see on many websites potentially suffer from the same sampling bias: They capture only the opinions of people who visit the sites and who want to participate, which might not be a representative sample of the population.