Ethical credit refers to an ethical relationship triggered by certain pre-agreements, contracts, promises, oaths, etc. in people's interactions. The reasonable order implied by it is condensed into observing promises and fulfilling the agreed ethical standards. People have formed corresponding moral behaviors based on their understanding of the rational order of credit ethical relations and the practice of rules.
According to the above definition, which of the following involves ethical credit?
Zhao promised her husband's deathbed request. After the death of her husband, he treated the two children left by her husband's ex-wife as his own and raised them.