Answer to Question 1
Answer: C
Explanation: C) Surveys and interviews are the most commonly used techniques for obtaining primary research. Less common primary-research techniques include observations, such as tracking the behavior of website visitors, and experiments in special situations, such as test marketing.
Answer to Question 2
Answer: A
Explanation: A) An online survey is susceptible to sampling bias because it captures only the opinions of those who visit the site and choose to participate, which might not be a representative sample of the population.