Answer:
The correct answer is letter "B": Fewer people are willing to participate in surveys.
Step-by-step explanation:
By making surveys more difficult while gathering primary data through them people will become less interested in participating in them. Surveys must be short and straight to the point to collect the greater quantity of samples possible. Otherwise, people will be unwilling to be part of the surveys or they will not take it seriously, giving any answer just to finish with the poll.