Electrical Circuit Problem / Electric Potential Difference

[fuvest]

Homework Statement

In the following picture, the absolute value of the difference in electric potential, between points A and B is:

A)5V
B)4V
C)3V
D)1V
E)0V

Homework Equations

E =qV
V = iR

The Attempt at a Solution

I have no idea where to start on this one, just started my electric circuits unit so please bare with me. Any help would be appreciated, thanks and sorry for the inconvenience.

 

[Student100]

Is there any current at points A or B? If so why, if not, why not?

 

[TomHart]

Can you reduce the circuit in any way? In other words, are there 2 resistors in series that you can reduce to a single resistor, or are there 2 resistors in parallel that you can reduce to a single resistor? How much current is flowing through the 4k resistor that is connected to point A?