Which of the Following Statements Correctly Describes the Spatial Relationships

Which of the following statements correctly describes the spatial relationships of the extrafusal and intrafusal fibers?

A) The extrafusal and intrafusal fibers alternate with one another down the length of a muscle like beads on a string.
B) The intrafusal fibers are coiled tightly around the extrafusal fibers,allowing them to sense movement of the extrafusal fibers.
C) The extrafusal fibers lie perpendicular to the intrafusal fibers,so that stretch in one type will be balanced by stretch in the other type.
D) The extrafusal and intrafusal fibers lie parallel to one another,so that both will stretch simultaneously.