A is correct. IEEE was the first standards body to create Ethernet standards. B, C, and D are incorrect. B is incorrect because ISO created the OSI Reference Model, not the first Ethernet standard. C is incorrect because ANSI is a U.S. standards body that adopts IEEE and other standards. D is incorrect because DIX for Digital Equipment Company, Intel, and Xerox teamed to create the first industry standard, but they are not a standards organization. Solution A is correct. IEEE was the first standards body to create Ethernet standards. B, C, and D are incorrect. B is incorrect because ISO created the OSI Reference Model, not the first Ethernet standard. C is incorrect because ANSI is a U.S. standards body that adopts IEEE and other standards. D is incorrect because DIX for Digital Equipment Company, Intel, and Xerox teamed to create the first industry standard, but they are not a standards organization..