What Theological Controversy Did the Council of Nicea Fail to Solve

Multiple Choice

What theological controversy did the Council of Nicea fail to solve, resulting in its continuation for several centuries?

A) the debate about the nature of Christ, fully divine and fully human
B) the sacraments in Communion
C) the incorporation of the Hebrew scriptures into the Christian Bible
D) the nature of God, whether eternal or time-bound
E) the authority of bishops versus priests