Concept:A covenant is a sacred agreement, and God appointed a visible token to serve as its everlasting sign.
Explanation:God promised to make Abraham the father of many nations and to bless his descendants.
God also commanded a physical sign so the covenant would never be forgotten.
In Genesis
17:10−11, God instructed Abraham that every male among his people must be circumcised.
God said, "It shall be a token of the covenant betwixt Me and you."
This act set Abraham's family apart as God's chosen people.
It also represented obedience and reminded every generation of God's promises.
Therefore, the sign of the covenant was not smoke, fire, or children, but circumcision.
Answer:The correct answer is Option C: Circumcision.