The correct option is B published over nine hundred poems
This is a factual question. So, locate the relevant line in the passage before answering. "By the time of her death in 1894, Christina had written more than II00 poems
(a)This is incorrect since Christina published 900 of the I I00 poems she had written.
(b)This is untrue because according to the passage, about 200 of her poems remained unpublished.
(c)This is untrue again, she published over 900 poems, she had written over 1100 poems although
(d)This is true. Hence, this is the right answer.