which was not produced by volcanic outgassing?\na. water vapor\nb. sulfur\nc. carbon dioxide\nd. oxygen

which was not produced by volcanic outgassing?\na. water vapor\nb. sulfur\nc. carbon dioxide\nd. oxygen
Answer
Brief Explanations:
Volcanic outgassing releases water vapor, sulfur - containing compounds, and carbon dioxide. Oxygen is mainly produced by photosynthesis and not by volcanic outgassing.
Answer:
D. Oxygen