The correct answer is A. IS-95.
IS-95 is a second-generation digital cellular technology that uses code-division multiple access (CDMA) to provide voice and data services. It was developed by Qualcomm and first deployed in the United States in 1995. IS-95 is also known as CDMAOne or cdmaOne.
IS-136 is a second-generation digital cellular technology that uses time-division multiple access (TDMA) to provide voice and data services. It was developed by the Telecommunications Industry Association (TIA) and first deployed in the United States in 1993. IS-136 is also known as TDMA or TIA/EIA-136.
ETACS is a second-generation digital cellular technology that uses time-division multiple access (TDMA) to provide voice and data services. It was developed by the European Telecommunications Standards Institute (ETSI) and first deployed in Europe in 1991. ETACS is also known as GSM-900 or DCS-1800.
EDGE is a third-generation mobile technology that uses enhanced data rates for GSM evolution (EDGE) to provide voice and data services. It was developed by the 3rd Generation Partnership Project (3GPP) and first deployed in 1999. EDGE is also known as Enhanced GPRS (EGPRS) or Enhanced Data Rates for GSM Evolution (EDGE).
In conclusion, the correct answer is A. IS-95.