Which answer choice gives the correct explanation for this problem?
40 ÷ 4
A4 groups of 10 positives
B4 groups of 10 negatives
C10 groups of 4 positives
D10 groups of 4 negatives
40 ÷ 4
A4 groups of 10 positives
B4 groups of 10 negatives
C10 groups of 4 positives
D10 groups of 4 negatives