What is one way to describe elements? A. They break down easily.

B. They are the most expensive materials on earth.

C. They are the building blocks of matter.

D. They are the smallest particles of any material.

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for k12

answer

the best answer is c

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;