19. For the' sake of the logic and coherence of this paragraph, Sentence 2 should be placed:
Your Answer is
Correct Answer is A
Explanation
There is a time word for almost two millennia in sentence 1 (for the overall summary sentence);
The key words of sentence 2 are: in the first century AD;
In sentence 3 The time word is about the same time, referring to in the first century.
Therefore, sentence 2 should be put in place, and A is correct.