Given below are some idioms/phrases followed by four alternative meanings to each. Choose the response (a), (b), (c) or (d) which is the most appropriate expressio Saving someone from danger (d) Easy escape
He makes decision `underline("on the fly.")`

Options

A. He decides quickly without any seriousness.
B. He decides with all seriousness.
C. He decides nonchalantly.
D. He is unwilling to decide.