Questions 168~171 refer to the following table.

【題組】168.Which of the following statements best describes the professional skills of high-impactworkers?
(A) They possess advanced professional skills and continually acquire new knowledgeand abilities to remain competitive.
(B) They have rudimentary professional skills and rarely acquire new knowledge orabilities.
(C) They have limited professional skills and occasionally learn new knowledge andabilities to remain competitive.
(D) They have moderate professional skills and often learn new knowledge and abilitiesto remain competitive.