Which commandment protects the sacredness of marriage?

• A. You shall not murder.
• B. You shall not bear false testimony against your neighbor.
• C. You shall not covet...anything that belongs to your neighbor.
• D. You shall not commit adultery.

Answer: (D)

Faithfulness in the marriage covenant is what this item tests. Adultery breaks that covenant by having sexual relations outside marriage, which undermines trust, commitment, and the family stability the marriage bond is meant to protect. By forbidding adultery, this commandment preserves the sacredness of the marital relationship and honors the commitment made before God and the community. The other commands address different areas—protecting life, upholding truth, and guarding against coveting what belongs to someone else—none of which directly guard the integrity of the marriage itself, making adultery the rule that specifically safeguards that sacred bond.