What was the apostle paul referring to when he wrote in 1 corinthians 1 that "the foolishness of god is wiser than men, and the weakness of god is stronger than men"?
a. god allowing evil in the world
b. the crucifixion of christ
c. christ having a humble birth
d. jesus choosing fishermen to be his apostles

B. The crucifixion of Christ                            

Explanation:

            First Corinthians is the epistle of Pauline of the New Testament of the Bible. Apostle Paul was one of the twelve apostle of Jesus Christ. Apostle were the chief disciples of Jesus Christ to spread the teachings of Christianity to the people.

          In the first Corinthians, apostle Paul mentions that the God's foolishness is more wiser that men and God's weakness is more stronger than men. By saying this Paul is referring to the crucifixion of Jesus Christ.

Thus the answer is ---

B. The crucifixion of Christ  

there is an explationation of this on a site called crash   course world history 1