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(A)  They are taking the elevator down.
(B)  They are shopping for clothes.
(C)  They are riding on an escalator.
(D)  They are across from each other.

(A)  All of the people are walking in the same direction.
(B)  One of the men is taking off his glasses.
(C)  There are trees growing along the road.
(D)  They are running in a line.