🚨🚨OBMEP An ant, initially at vertex A, walks along the lines of the grid in the figure.
OBMEP An ant, initially at vertex A, walks along the lines of the grid in the figure, always to the right or upwards, until it reaches vertex B. In how many ways can it do this passing through one of the four highlighted points?
A 4
B 32
C 36
D 64
E 74
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