Answer:
C. He is excited and nervous, but doesn't want Natalya to know it.
Explanation:
In this farce - <em>The Proposal</em> by Anton Chekhov we have Lomov and Natalya as main characters, besides her father. Lomov is a kind of man who has a problem with coming to the point when talking thus making a lot of digresses. Since this is a sensitive matter for him, he expresses anxiety and nervousness first while talking to Chubukov, Natalya`s father, then while talking to Natalya. So he just goes around expending the talking by, as seen in this excerpt, guessing her reaction to the still unknown matter of marital proposal. Then he comments the weather while trying to show himself as relaxed, though he is not even close to that.
The answer is character vs character.
A participle has the following form: verb + -ing, and the only word in this sentence that takes that form is A, 'flying', which is the correct answer.
