The choice that combines the given sentences most effectively is: Option C : furnished: their.
<h3>What is sentence correction?</h3>
Sentence correction or sentence improvement is a type of grammatical practice where a sentence is given with a word or a phrase that requires grammatical changes or improvement.
Now, here in the given sentence:
"The plainer rooms are more sparsely <u>furnished. Their</u> architectural features, furnishings, and decorations are just as true to the periods they represent",
The most suitable choice, by sentence correction, to combine the two sentences will be: Furnished: their (option C).
To learn more about sentence correction, refer to the link: brainly.com/question/14632568
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That would be 225% and 2.25 I really hope this helps!!
Recall your d = rt, distance = rate * time
thus

notice, the first car leaves at "x" time, the other leaves on hour later, or x + 1
the first car travels some distance "d", whatever that is, thus
the second car, picks up the slack, or the difference, they're 380 miles
apart, thus the difference is 380-d