Verbs are the words that displays action or pertains to action in a sentence. In the sentence "<span>Shouldn’t we have left early and arrived on time first?</span>", the verbs are the words have left and arrived. Therefore, the correct answer among the choice is option C.
Probably B because if you use abbreviations you can type quicker but idk
Quickly would be the adverb adverbs can usually end with ly