Question

1. what is crucial for preventing misleading results in surveys?

a. professional interviewers
b. large sample sizes
c. questionnaire design
d. statistical software

Explanation:

Questionnaire design is crucial as it directly affects the quality and accuracy of data collected. Biased or poorly - worded questions can lead to misleading results. Professional interviewers (a) can help but are secondary to the design. Large sample sizes (b) without proper design still may not yield valid results. Statistical software (d) is for analysis, not prevention of misleading results at the data - collection stage.

Answer:

C. Questionnaire design