Which one of the following statements concerning sampling risk and nonsampling risk is true?

a. Sampling risk, but not nonsampling risk, can be reduced by taking a larger sample.

b. Nonsampling risk, but not sampling risk, can be reduced by taking a larger sample.

c. Both sampling risk and nonsampling riskcan can be reduced by taking a larger sample.

d. Nonsampling risk decreases as sampling risk decreases.

e. Sampling risk decreases as nonsampling risk decreases.