Which is a counterexample to the conjecture? The product of any two consecutive integers is a composite number.
A.
3 ´ 4 = 12
B.
30 ´ 31 = 930
C.
1 ´ 2 = 2
D.
10 ´ 11 = 110
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A.
3 ´ 4 = 12
B.
30 ´ 31 = 930
C.
1 ´ 2 = 2
D.
10 ´ 11 = 110
Need help