Answer: Option B
Explanation: In the given case, Remfur inc. specifically wanted their HR Ryan to recruit such employees for the new division that may bought new ideas and perspectives in the company, thus, external source of recruitment should be used by Ryan instead of internal sources like transfer or promotion etc.
Hence, Option B, posting advertisement in the newspaper is the right answer, as the new employees from outside the entity will bring new ideas since the current employees will be used to working in the existing operational structure.