Question

question 3 1 pts a material that is collected from a known location but is of unknown origin. ∘ questioned sample ∘ known sample ∘ control sample

Explanation:

A questioned sample is a material collected from a known location but with unknown origin (used for analysis to determine origin/characteristics). A known sample has a verified origin, and a control sample is for comparison (e.g., in experiments). So the description matches a questioned sample.

Answer:

A. Questioned sample