Which of the Following Illustrates the Management Practice of Gaining

Which of the following illustrates the management practice of gaining competitive advantage through people?

A) The management of Mabette, a law firm, believes that it is best not to disclose the company's financial information to the employees of the organization.
B) The board of directors of Naocomp, a software company, decides to launch its own research and development division by investing from the company's profits.
C) Pentafth, an advertising agency, does not provide job security to its employees under the pretense that the fear of losing their jobs would cause the employees to perform well.
D) Olagamp, a pharmaceutical company, recruits aggressively without enough screening so that it does not lose any talented job applicants in the process.