When a character walks and talk in a certain way, it reveals a lot about their character. For example, if a character were to walk very energetically and quickly with no shame, they may have confident character traits.
<span>C is the correct answer. There is an understood you as follows: “for once in your life, [you should] try something new and exciting”. ‘For once in your life’ in this sentence is an adjunct and is extra information given to emphasise the strength of the speaker’s feelings.</span>