Which option most likely describes scientist(s) working in pure science?

Question

A quality assurance inspector examining the contents of large tanks used to make fermented products.
Two scientists in a lab examining vials of urine they are analyzing for levels of excreted protein.
Three engineers standing in a field examining a set of design plans for future wind turbines.
Two inspectors at a water filtration plant examining the transparency and clarity of a sample of a water.

Answer 1

Well, which are scientists?

Answer 2

second

Answer 3

Two scientists in a lab examining vials of urine they are analyzing for levels of excreted protein.

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