Answer: D. Vinegar and baking soda react to form a new gaseous substance.
Step-by-step explanation:
When Vinegar and baking soda react, it produces carbon dioxide which bubbles (effervescence) as it is produced. This is why this reaction is often used to mimic that of a volcanic eruption.
C₂H₄O₂ + NaHCO₃ → NaC₂H₃O₂ + H₂O + CO₂
vinegar + sodium bicarbonate → sodium acetate + water + carbon
dioxide