The first blank needs an adjective for 'person' and'nonchalant' and 'insouciant' are the only adjectives among the words. The rest are nouns. This eliminates options (c) and (d). The word 'ennui' means boredom which is a misfit for the second blank. This rejects (e). 'Remonstration' refers to strong disapproval or sharp verbal protest while 'phillipic' is a verbal denunciation or censure. Clearly, the person engaged in a 'remonstration' or protest; and the boss’s response was a 'phillipic' or censure.