Upon Ingestion,grain Alcohol $\mathrm { C } _ { 2 }$

Upon ingestion,grain alcohol, $\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 6 }$ O,is metabolized into acetaldehyde, $\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 4 }$ O,which is a toxic substance causing headaches as well as joint pains typical of a "hangover." Is the grain alcohol oxidized or reduced as it transforms into acetaldehyde?

A) The grain alcohol is reduced.
B) The grain alcohol is oxidized.
C) Some of the grain alcohol is oxidized and some is reduced to other products.
D) The grain alcohol is neither oxidized nor reduced.