WILL MARK BRAINLEST || 10 PTS || A worker uses a magnet to remove bits of iron from a powdered sample. Which describes the sample before the worker used the magnet to remove the iron? Group of answer choices

The sample is a mixture because the iron was removed using a physical method.

The sample is a compound because the iron was removed using a physical method.

The sample is a compound because the iron was removed using a chemical method.

The sample is a mixture because the iron was removed using a chemical change.