On what concept did the first two commandments focus?
a. obedience
b. monotheism
c. morality
d. adultery

The correct answer is B. The ten commandments are Judeo-Christian biblical principles that constitute the moral pillar of these religions. The first two of them focus on monotheism, since they say:

1- "I am the Lord your God, who brought you out of Egypt, out of the land of slavery. Thou shalt have no other gods before Me . Here the emphasis is placed on the divine character of the received commandments, as they are offered by the supreme and unique God. Unique because the same commandment forbids the worship of another divinity.

2- "Thou shalt not make unto thee any graven image". In this commandment the concept of monotheism imposed in the first one is reinforced, since it prohibits the adoration of any image, nor the adoption of any idol.

in this way, the first two commandments establish monotheism in the Judeo-Christian religions, by pointing out the existence of a single God.

the answer is a. harriet tubman was a nurse on the battlefield.