Which phenomenon most directly led to christianity separating from judaism? a. roman persecution b. jewish rejection of the trinity c. writing of the gospels d. conversion of many non-jews

I think it is B.

One of the main reasons in the Bible (I get all my info from the KJV) is because the rejected Jesus as being the living sacrafice/savior to pay the price for all our sins. The main reason they rejected him is because Jesus said he was "I am" which is refering to God and in order to believe that Jesus is the I am you have to believe in the trinity. So when they rejected Jesus they rejected the trinity To this day Jews are looking for his coming but really his coming will be the second coming.

answer; reincarnation of an eternal soul;

answer; extroversion;