Concept:The exiles returned to Jerusalem under the Persian king who issued the decree of release.
Explanation:Nebuchadnezzar was the Babylonian king who took the Jews into exile, but he did not allow them to return.
The return happened in the first year of Cyrus, king of Persia, fulfilling the word of the Lord spoken by Jeremiah (Ezra 1:1).
The Lord stirred up Cyrus to make a proclamation throughout his kingdom, permitting the exiles to go up to Jerusalem and rebuild the house of the Lord (Ezra 1:2-4).
Cyrus also brought out the vessels of the temple, which Nebuchadnezzar had taken from Jerusalem, and gave them back for the rebuilding (Ezra 1:7-11).
Therefore, it was during the reign of Cyrus that the exiles returned to Jerusalem.
Answer:B. Cyrus