Answer:
The false statement is letter "C": Stratification of the population into several homogeneous sub-populations generally reduces audit efficiency.
Step-by-step explanation:
Stratification is the method of grouping a population into subpopulations, with each group of units having similar characteristics. The efficiency of audits can be increased if the auditor stratifies a population by grouping it into different sub-populations since the variability of items will be reduced.