If acetic acid has a pure vapor pressure of 20 torr at 30 degrees C and acetaldehye has a pure vapor pressure of 1000 torr at 30 degrees C, a mixture of 12 moles of acetic acid and 8 moles of acetaldehye would have what total vapor pressure?
A. 412 torr
B. 510 torr
C. 612 torr
D. 608 torr
E. 408 torr