Oxygen Gas at 34

Oxygen gas at 34.5 °C is compressed from 45.7 L to 34.5 L against a constant pressure of 750 mmHg.What is the work done in joules by the system?

A) 1.12 × 10^{3 J}
B) -1.12 × 10^{3 J}
C) 9.09 × 10^{4 J}
D) -9.09 × 10^{4 J}
E) 4.55 × 10^{3 J}