Check the Following Paragraphs for Unity

Check the following paragraphs for unity. Select the number of the sentence that does not belong in the paragraph.
-(1) Developing "hard skills" like technical expertise and experience is important to career success. (2) However, it is the "soft skills" that help people get a job, keep it, and excel in their career fields. (3) A soft skill like the ability to communicate, for example, helps a job applicant express himself or herself well in job interviews, which increases the chances of being hired. (4) Job interviews can be very stressful, so applicants should learn to control their anxiety with techniques like breathing and positive affirmations. (5) Soft skills like a strong work ethic and the ability to work with different kinds of people will help you keep the job once you get it. (6) And solid information-gathering, analytical, and problem-solving skills are all soft skills that help employees advance into positions with greater authority and higher pay.

A) sentence 3
B) sentence 4
C) sentence 5