The Work Done by an Ideal Gas in an Isothermal $\times$

The work done by an ideal gas in an isothermal expansion from volume V₁ to volume V₂ is given by the formula:
W = nRT ln(V₂/V₁)
Standard atmospheric pressure (1 atm) is 101.3 kPa. If 1.0 L of He gas at room temperature (20ºC) and 1.0 atm of pressure is compressed isothermally to a volume of 100 mL, how much work is done on the gas?

A) 5.6 kJ
B) 4.7 $\times$ 10² J
C) 4.7 $\times$ 10² kJ
D) 2.3 $\times$ 10² kJ
E) 2.3 $\times$ 10² J