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Determine whether the data set is a population or a sample. Explain your reasoning.
The soil contamination levels at 11 locations near a landfill.
Choose the correct answer below.
OA. This is a population, because it is a collection of soil contamination levels at some locations near a landfill.
OB. This is a population, because it is a collection of soil contamination levels at all locations near a landfill.
OC. This is a sample, because it is a collection of soil contamination levels at all locations near a landfill.
OD. This is a sample, because it is a collection of soil contamination levels at some locations near a landfill.