1. Which one is not correct about network effects?

	A.	Direct network effects arise when the utility of a product or service to a new user increases with the installed base of users of that product or service.
	B.	Indirect network effects are often called cross-side effects.
	C.	A locally clustered network creates higher barriers to entry than a global network does.
	D.	Network effects generally increase the barriers to entry, but their impact is limited by multi-homing.
	E.	Product reviews on Amazon is an example of direct network effects.