Final answer:
The question appears to be missing information required to calculate the sample standard deviation, such as raw data or a specific formula for adjusting the population standard deviation based on the sample size.
Step-by-step explanation:
The question asks for the sample standard deviation when the population standard deviation is known, and the number of exposures (or the sample size) is given. In statistics, the sample standard deviation is calculated differently depending on whether you have access to the entire population's data or just a sample. However, when a population standard deviation is given and assuming this is a simple random sample, the sample standard deviation can often be the same as the population standard deviation if the sample is representative. In this scenario, since the value of the sample standard deviation is not being directly calculated from sample data, there is no formula provided to calculate it from the given population standard deviation and the sample size.
Given the multiple-choice options and without a clear way to calculate it from the given information, we would not be able to precisely determine the sample standard deviation. This question seems to be missing crucial information or may be presented incorrectly. To find the sample standard deviation, we would typically need raw data from the sample or an additional formula indicating how the standard deviation changes with sample size under a particular sampling method.