Question

Which statement is true about oxygen and rocks?

Both are mixtures.

Both are pure substances.

Oxygen is a mixture and a rock is a pure substance.

Oxygen is a pure substance and rocks are mixtures.

Answer 1

Oxygen is not pure. so that excludes B and D. Rock is also a mixture. Therefore A is your answer

Step-by-step explanation:

Both are mixtures.

Answer 2

B. both are pure substances