Based on my strong skills with cold calling and face-to-face communication, i'm confident that this gig is right for me.

which word or phrase most clearly makes the tone inappropriate for a job application?

a. this gig
b. face-to-face
c. cold calling
d. i'm

The correct answer is A. This Gig

Explanation:

A job application is a process of filling a document with personal and professional information the employer uses to know whether a person is suitable or not for a job vacant. Considering this document influences the employer decision on hiring someone or not and the document is part of a formal context it is important to use only accurate information and avoid the use of informal language or tone such as  slangs, rude or colloquial words that give a negative impression to the employer and do not show the professional skills of the person that fills the application. Considering this, the word that makes the tone inappropriate for a job application is "this gig" because this is a very informal slang for the word job and will give a negative impression and affect negatively the decision of the employer.

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answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.