Use the Following Figures to Answer the Next Problem $\varepsilon$ = 15 V,C = 20

Multiple Choice

Use the following figures to answer the next problem.
-An uncharged capacitor and a resistor are connected in series to a battery as shown. If $\varepsilon$ = 15 V,C = 20 $\mu$ F,and R = 4.0 $\times$ 10⁵ $\Omega$ ,the time constant of the circuit is approximately

A) 10 s
B) 8.0 s
C) 18 s
D) 4.0 s
E) 2.5 s