The correct option is C Audacious
Words that are similar to each other in meaning are also known as synonyms of each other. The word ‘Presumptuous’ means to fail to observe the limits of what is deemed appropriate. While 'Bold', 'Egotistical' and ‘Arrogant’ are actually all synonyms of the word, 'Audacious' is the closest in meaning to ‘Presumptuous’ – leaving us with the correct answer, Option D).