Which excerpt from serena lawrences cover letter exhibits the most informal styile ?

What is most likely nelson mandela's purpose of using third person point of view after introducing himself in his introductory paragraphs

Who dies in a duel because of his pride and his anger

Identify the sentence with all words spelled correctly. a. ? it's your responsabilitiy to lock up. b. ? it's your responsability to lock up. c. ? it's your responsabilty to lock up. d. ? it's your responsibility to lock up.