$19.)$ Which sequence is correct for the order of utilization in the phosphorylation cascade see in liver to degrade glycogen in

response to glucagon?

$($A$)$ phosphorylase kinase, glycogen phosphorylase, protein kinase A$,$ adenylate cyclase

$($B$)$ protein kinase A$,$ Adenylate cyclase, phosphorylase kinase, glycogen phosphorylase

$($C$)$ adenylate cyclase, phosphorylase kinase, protein kinase A$,$ glycogen phosphorylase

$($D$)$ adenylate cyclase, protein kinase A$,$ phosphorylase kinase, glycogen phosphorylase

$($E$)$ glycogen phosphorylase, phosphorylase kinase, protein kinase A$,$ adenylate cyclase