A student is monitoring the oxidation of propan-1-ol. They isolate a colorless liquid product and record its mass spectrum to confirm its identity.

Which carbon compound is the mass spectrum from?
C3H8O\text{C}_3\text{H}_8\text{O}C3H8O
C3H6O2\text{C}_3\text{H}_6\text{O}_2C3H6O2
C3H5O2+\text{C}_3\text{H}_5\text{O}_2^+C3H5O2+
C4H8O2\text{C}_4\text{H}_8\text{O}_2C4H8O2