German-based logistics company DHL has struggled to compete against FedEx and UPS in the U.S. One of the reasons is its liability of foreignness. According to the textbook, why has it failed to overcome this obstacle? a. DHL failed to develop sufficient cash reserves to operate in the U.S. Refer to 10.6 Management Savvy. b. DHL failed to develop overwhelming resources and capabilities. Refer to 10.6 Management Savvy. c. DHL failed to match its market entry and geographic diversification efforts to its strategic goals. Refer to 10.6 Management Savvy. d. DHL failed to understand the rules of the game governing competition in the U.S. market. Refer to 10.6 Management Savvy