A 30-K $\Omega$ Resistor Is Connected in Series with a 2 $\mu$

Multiple Choice

A 3.0-k $\Omega$ resistor is connected in series with a 2.0- $\mu$ F initially uncharged capacitor. The RC combination is charged by a 6.0-V battery. The change in voltage between t = RC and t = 3RC is

A) 4.9 V.
B) 3.9 V.
C) 2.9 V.
D) 1.9 V.
E) 0.90 V.