The correct answer is D. 21543.
The first option, 23514, is incorrect because the word “very” comes before the word “distressing.” The second option, 32154, is incorrect because the word “distressing” comes before the word “very.” The third option, 14523, is incorrect because the word “situation” comes after the word “very.”
The fourth option, 21543, is the correct answer because it is the only option that places the words in the correct order. The word “situation” comes first, followed by the word “very,” followed by the word “distressing.”
The word “situation” refers to the state of affairs at a particular time. The word “very” means to a great extent or degree. The word “distressing” means causing or feeling great pain or anxiety.