A question mark is the answer
I think the answer is "In 1867, the United States bought Alaska from Russia for $7 million". When you ask the question "when" the question is asking about time. In this excerpt, when is answered by "in 1987". while the sentence supported it is the event that happened during that time, which is " The US bought Alaska from Russia for $7 million.
<u>Answer</u>:
Tthe sentence which can be revised to eliminate redundancies is
B: Juan was costumed in disguise when he entered the room.
<u>Explanation</u>:
Redundancy in a sentence refers to same data being used more than once in a sentence just by using a different word. It doesn’t make a sentence grammatically wrong, but more than one similar word seems unnecessary. They make the writing weak and not appealing. So, redundancy should be avoided while writing.
In the given sentences, Juan was costumed in disguise when he entered the room has redundancy. “In disguise” means when one is dressed differently or has made a different appearance. So, given sentence can be written as “Juan was disguised when he entered the room”. Writing “costumed in disguise” makes the sentence redundant.