What is the Anatomical Name for the Combination of Cisternae

Question

What is the anatomical name for the combination of cisternae and a transverse tubule?
A) sarcoplasmic reticulum
B) sarcolemma
C) triad
D) Z line

Accepted Answer

The combination of cisternae (from the sarcoplasmic reticulum) and a transverse tubule is known as a triad.