To Find the Equivalent Resistance of the Combination of Resistors

Multiple Choice

To find the equivalent resistance of the combination of resistors shown across the 28-V battery by the method of possibly repeated applications of combining resistors in series and /or combining resistors in parallel,the first step would be which of the following?

A) Combine the two 10 Ω in parallel since they can be done in your head.
B) Combine,in series,the two 3-Ω resistors and the 4-Ω resistor in the right-hand branch of the circuit.
C) Combine the seven resistors (two 5 Ω,three 3 Ω,one 2 Ω and one 4 Ω) in the outer loop of the circuit in series.
D) This problem cannot be done by combining series and parallel resistors.