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.