1. What shall I do that I may inherit eternal life?” (Mk 10:17)
    Believes in Jesus as the Christ and preaches the gospel
    Jn 1:12, 1 Jn 5:1, Mt 4:19

A rich young man came to Jesus and asked what he must do to gain eternal life. Jesus told him to keep all the commandments first, then sell his possessions and give to the poor and follow Him. Then the young man returns with sorrow. At this time, the disciples asked Jesus who could be saved. (Mk 10:17)

Mk 10:17 And when he was gone forth into the way, there came one running, and kneeled to him, and asked him, Good Master, what shall I do that I may inherit eternal life?

Those who believe in Jesus as the Christ will be saved. (Jn 1:12, 1 Jn 5:1)

Jn 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:

1 Jn 5:1 Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.

Those who believe in Jesus as the Christ are destined to preach the gospel. (Mt 19:29, Mt 10:37-38, Mt 4:19)

Mt 19:29 And every one that hath forsaken houses, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my name’s sake, shall receive an hundredfold, and shall inherit everlasting life.

Mt 10:37 He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me.
38 And he that taketh not his cross, and followeth after me, is not worthy of me.

Mt 4:19 And he saith unto them, Follow me, and I will make you fishers of men.