After a $5 million ad campaign, Coca-Cola measured its effectiveness by calculating the cross elasticity of demand between Coke and Pepsi. A successful campaign would be indicated if the cross elasticity went from

a. 0.9 to 0.5.
b. 0.9 to 1.5.
c. ?0.5 to ?0.2.
d. ?0.9 to ?1.5.

a

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