The correct answer is A. She used concrete imagery to illustrate abstract concepts, such as love and death.
Step-by-step explanation:
The excerpt presented explains important features about the poetry of Emily Dickinson, in the case of the sentence (11) this refers to the way Dickinson uses concrete imagery as "Concrete imagery was used by her to illustrate abstract concepts, such as love and death". In terms of style, this sentence needs to be rewritten because the use of the passive voice rather than the active voice interrupts the flow of the text, also as the sentences that surround this sentence are in the active voice, the use of passive voice is inappropriate. considering this, the best way to rewrite this sentence is "She used concrete imagery to illustrate abstract concepts, such as love and death" because this solves the issue with the passive voice and also preserves the original idea keeping the flow and formal style of the text.