The correct answer is C.
A recruitment process is a formal situation where employers are looking for responsible candidates, prepared for the job they will have to undertake (in terms of education or training) and which have an adequate personal image, both in terms of physical appearance and when establishing social and labor relationships, as the image of the employees many times conforms the image of the company.
Therefore it is not advisable to use slang words, which are not wrong ones, but definitely are inappropiate in a work environment.