Connor was asked to solve the problem 39+25 twice, the first time when the problem was in a context of baseball​ cards, and the second time when the problem was not in a context. When Connor solved the problem the second time he described the process in these​ steps:   30+20 = 50 5+5+50 = 60 4+60 = 64 In the second​ step, how did Connor come up with adding 5+5 to​ 50?     A. He made a mistake but still happened to find the correct sum.   B. He decomposed the nine from 39 into five and​ four, and then added the five to the five from 25.   C. He knew that nine and five was​ 14, which can be decomposed into 5+5+4.   D. None of the above.

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