What Does the Scope of the Firm Refer To

What does the scope of the firm refer to?

A) the range of activities the firm performs externally and its social responsibility activities
B) to gain competitive advantage based on where it locates its various value chain activities
C) the firm's capability to employ vertical integration strategies
D) the range of activities the firm performs internally and the breadth of its product offerings, the extent of its geographic market, and its mix of businesses
E) to prevent foreign competition from affecting the market