The temperature dropped from - 2 degrees to - 11 degrees. How many degrees was the drop?

Choose the best answer from the options below:
A -13
B 13
C 9
D -9

3 answers

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The answer is obviosly 9 (which is c.l). Well i am not sure but that's what i think. I hope its c9rrect because i don't like to give wrong information.
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