Cytological Examination of Resting and Contracted Muscle Provides Important Support

Cytological examination of resting and contracted muscle provides important support for our current model for how skeletal muscle contracts.This evidence includes the observation that during contraction the

A) Z lines move farther apart.
B) lengths of the thick and thin filaments change significantly.
C) microtubules disassemble.
D) muscle fibers change color.
E) H zone becomes smaller.