Four Resistors and a 6-V Battery Are Arranged as Shown $\varOmega$

Multiple Choice

Four resistors and a 6-V battery are arranged as shown in the circuit diagram.
-The largest potential difference is across which resistor(s) ?

A) the 10- $\varOmega$ resistor
B) the 20- $\varOmega$ resistor
C) the 30- $\varOmega$ resistor
D) the 60- $\varOmega$ resistor
E) It is the same and the largest for the 30- $\varOmega$ and 60- $\varOmega$ resistors.