A voluntary response sample of 7000 adult heights is collected. If the population of adult heights follows a normal distribution, will the histogram of the sample be bell-shaped? Give reason.

• A. Yes, because the population follows a normal distribution.
• B. No, because voluntary response samples may be biased and not represent the true population.
• C. Yes, because the sample size is large enough to ensure a normal distribution.
• D. No, because all histograms are always skewed regardless of the population distribution.

Answer: (B)