Answer: I don’t believe there is an error
Explanation: I’ve looked over this multiple times, and with the options given, there doesn’t seem to be a mistake. I hope this helped! And sorry if I missed an error (if there is one). But I’m pretty sure there isn’t any.
The etymology of the word impose includes:
> in (Latin) meaning in or upon + ponere (Latin) meaning put = imponere (Latin) meaning inflict or deceive or poser (Old French) meaning "to put". Therefore, the answer is option D. To put.
The use of contractions and colloquial 'slang' implies a writer, or persona adopted by the writer, that doesn't have a great deal in the ways of education, he/she appears to be writing things as they are said rather than how we as an audience know them to be spelt. This can be shown by quoting any contraction or wherever there's an amendment to the text, for example "hender" instead of "hinder".
<span>The use of nature also implies the simpleness of the two characters, by using the stream imagery it gives quite a straightforward steady approach, more gentle than say a river but still pretty much in that ideal</span>
More info? What did Percy say about Mrs. Dodds?