According to Sergei Eisenstein's ideas on the "collision montage," a single shot should be thought of as akin to:

A. a brick, which links with other bricks to form a structure.
B. a cell formed by the collision of two elements in opposition to each other.
C. an atom capable of existing independently or as a component of a larger entity.
D. a word, which communicates meaning only when strung together with other words to form a sentence.

Answer: B