How Did Marriott Use Economies of Scope to Achieve Greater

How did Marriott use economies of scope to achieve greater economic value than its competitors?

A) Marriott increases in cost per hotel unit as number of customers increases.
B) Marriott decreases in cost per hotel unit as number of customers increases.
C) Marriott lowered its cost structure by focusing its production assets on one type of hotel, which increased its menu and thus its differentiated appeal.
D) Marriott lowered its cost structure by sharing its production assets over a several types of hotels, which increased its menu and thus its differentiated appeal.