Allentown's Taco has been trying to directly copy the strategies of Chipotle Mexican Grill. However, Allentown's Taco has not been able to introduce the same types of produce into its recipes. This is because Allentown's Taco cannot determine what the resources of Chipotle are and/or how they can be re-created. Which of the following barriers to imitation does this scenario best illustrate? social complexity resource homogeneity path dependence causal ambiguity