Which succinct statement captures the key difference between liver and skeletal muscle glycogen function?

Both liver and muscle glycogen are stored within adipose tissue and mobilized by lipase during exercise to supply free glucose to the blood, conflating glycogen and fat storage compartments and mobilization enzymes.

Liver glycogen stores are exclusively for hepatic oxidative phosphorylation and never contribute to systemic glucose, a misstatement contradicting hepatic glucose release function.

Liver glycogen maintains blood glucose for the whole body; muscle glycogen is used locally to fuel muscle contractions and is not released to raise blood glucose.

Muscle glycogen is the primary source of blood glucose in fasting states because muscle can export glucose directly to all tissues via GLUT4 channels, which incorrectly ascribes systemic glucose export to muscle.