Which of the Following Is an Advantage of Relying on Internal

Which of the following is an advantage of relying on internal recruitment sources?

A) It is a good way to strengthen one's own company and weaken one's competitors at the same time because it increase diversity.
B) It generates a sample of applicants who are well known to the firm.
C) The applicants are relatively less knowledgeable about the company's vacancies and hence easily trainable.
D) Because of the applicants' lack of knowledge about that particular position, their expectations are easy to meet.
E) It results in a workforce whose members all think alike and who therefore are more suited to innovation.