The correct answer is A. CdmaOne.
CdmaOne is a 2G cellular network technology that was developed by Qualcomm. It is also known as IS-95, which stands for Interim Standard 95. CdmaOne was the first commercially successful CDMA network technology, and it was widely used in the United States and other countries in the 1990s and early 2000s.
CdmaOne is a digital cellular network technology that uses spread spectrum technology to spread the signal over a wider frequency range. This makes it more resistant to interference and allows for more users to share the same spectrum. CdmaOne also uses a time division multiple access (TDMA) scheme to divide the time slots on the network among multiple users. This allows for more efficient use of the network resources.
CdmaOne was a major technological advance in cellular networks, and it helped to pave the way for the development of 3G and 4G networks. It is still used in some parts of the world, but it has been largely replaced by newer technologies.
The other options are incorrect. B. CdmaTwo is a 3G cellular network technology that was developed by Qualcomm. C. IS-136 is a 2G cellular network technology that was developed by the Telecommunications Industry Association (TIA). D. IS-95B is an enhanced version of the IS-95 CDMA standard.