Which situation below will result in zero when the quantities are combined?

A.  Sangi has $45 in his savings account and withdraws $42.

B.  After riding his dirt bike, the tires lost 4 psi of air, and Derek pumps 4 psi of air back in.

C.  The temperature at 4:00am was -3oF, and by noon the temperature was 5oF.

D.  Art’s dog lost 5 pounds over the summer and gained 7 pounds that winter.

Making Zero
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