Which was not a reason for the decline of the heian dynasty in japan?

What is the best example of interdependence and the exporting of u.s. culture in the food industry? a) american fast food restaurants have thousands of locations around the world. b) the u.s. can place restrictions on food imports from other countries. c) local restaurants in the u.s. use foods from many countries. d) chinese spend more on groceries than americans.