[单选题]
The absolute potential at a distanr3x hs).;vo uqce of 2.0 m from a positnfr.5.l4umr v ive point charge is 100 V. What is the absolute potential 4.0 m awa .uml.rr5v nf4y from the same point charge?
A. $25 \; V$
B. $50 \; V$
C. $200 \; V$
D. $400 \; V$
