context: The network's flagship owned-and-operated station, WJZ-TV in New York City (later re-called WABC-TV), signed on the air on August 10, 1948, with its first broadcast running for two hours that evening. ABC's other owned-and-operated stations launched over the course of the next 13 months: WENR-TV in Chicago signed on the air on September 17, while WXYZ-TV in Detroit went on the air on October 9, 1948. In October 1948, as a result of an influx of television station license applications that it had issued as well as a study it undertook on the use of the VHF spectrum for broadcasting purposes, the FCC implemented a freeze on new station applications. However, KGO-TV in San Francisco, which had received its license prior to the freeze, made its debut on May 5, 1949. On May 7, 1949, Billboard revealed that ABC had proposed an investment of $6.25 million, of which it would spend $2.5 million to convert 20 acres (80,937 m2) of land in Hollywood into what would become The Prospect Studios, and construct a transmitter on Mount Wilson, in anticipation of the launch of KECA-TV, which was scheduled to begin operations on August 1 (but would not actually sign on until September 16).
question: న్యూయార్క్లో WJZ TV ప్రసారం ఎప్పుడు ప్రారంభమైంది?
answers: August 10, 1948 August 10, 1948 August 10, 1948