Answer:
C Apple's need to continually innovate
Step-by-step explanation:
Organisation personnel can be hired through internal recruitment - from within the organisation, or through external recruitment - from outside the organisation.
Internal Recruitment has advantage of fresh, new talented people with creative, innovative ideas. External Recruitment has advantage of no need to introduce & orient existing people with organisation culture, rules etc.
Apple condition existed, suggesting to hire from outside : Apple's need to continually innovate
Apple condition existed, favouring replacing CEO from within the firm : The need for the CEO to know the firm's core competencies as well as be able to develop new ones