One Ohm's Law Formula $\mathrm { P } T = \mathrm { P } _ { 1 } + \mathrm { P } _ { 2 } + \text { etc. }$

Multiple Choice

One Ohm's law formula $\mathrm { P } T = \mathrm { P } _ { 1 } + \mathrm { P } _ { 2 } + \text { etc. }$ can be used to solve for total power in:

A) series-parallel circuits.
B) series circuits.
C) parallel circuits.
D) all of these.