What is the Wow! signal? A) A UV signal, recorded by the International Ultraviolet Explorer in 1975 B) A strong narrow-band radio signal, detected by the Big Ear radio telescope in 1977 C) A ultraviolet light beam, captured by the Hubble Space Telescope in 2009 D) An X-ray event, detected by the Chandra Telescope in 2011 E) An optical light flash, observed by the Mc Donald Observatory, West Texas, in 2012

The Wow! signal refers to option B) A strong narrow-band radio signal, detected by the Big Ear radio telescope in 1977. The Wow! signal was a brief but powerful radio signal detected by the Big Ear radio telescope at Ohio State University's Perkins Observatory on August 15, 1977. It lasted for approximately 72 seconds and was detected in the radio frequency range of 1420 MHz.

To determine the answer to this question, you would need to have knowledge of the different signals and telescopes mentioned in the options. For example, if you know that the Wow! signal is a radio signal and not any other type of signal like UV, X-ray, or optical light, you can eliminate options A, C, D, and E. Then, by knowing that the Big Ear radio telescope detected the Wow! signal, you can conclude that option B is the correct answer.

Note that it is important to have prior knowledge or access to reliable sources to find the answer to this question.