question:  What is true about Doctor Universe?
context: Doctor Universe By CARL JACOBI Grannie Annie, who wrote science fiction under the nom de plume of Annabella C. Flowers, had stumbled onto a murderous plot more hair-raising than any she had ever concocted. [Transcriber's Note: This etext was produced from Planet Stories Fall 1944. The Spacemen's was a sanctuary, a rest club where in-coming pilots and crewmen could relax before leaving for another voyage. The rule that no females could pass its portals was strictly enforced. To her publishers and her readers she might be Annabella C. Flowers, author of a long list of science fiction novels. They may have been dime novels, but they weren't synthetic. If Annabella C. Flowers wrote a novel, and the locale was the desert of Mars, she packed her carpet bag and hopped a liner for Craterville. It read: ONE NIGHT ONLY DOCTOR UNIVERSE AND HIS NINE GENIUSES THE QUESTION PROGRAM OF THE SYSTEM As we strode down the aisle a mangy-looking Venusian began to pound a tinpan piano in the pit. Before each set stood an Earthman operator. I am Doctor Universe, and these are my nine experts." I will only say that on this stage are nine visi sets, each tuned to one of the nine planets. At transmitting sets all over these planets listeners will appear and voice questions. For every question missed, the sender will receive a check for one thousand planetoles . The operator of the Earth visi twisted his dials and nodded. Sharp and dear his voice echoed through the theater: " Who was the first Earthman to titter the sunward side of Mercury? " Doctor Universe nodded and turned to Grannie Annie who had raised her hand. Questions from Mars, from Earth, from Saturn flowed in the visi sets. With Doctor Universe offering bantering side play, the experts gave their answers. They applauded as before but they did so only at the signal of Doctor Universe. Kagors, of course, had an unpleasant history of persecution since the early colonization days of the Red Planet.
output:  His audience reacts so well to him because much of the population is under the influence of Green Flame.
options:  His audience reacts so well to him because much of the population is under the influence of Green Flame.  He knows about the whereabouts of Green Flame and is hiding it from Grannie Annie.  There is nothing of note to him. He is just a popular TV personaility.  He is using Green Flame himsel to influence his audience and force them to watch. He is the one who stole it.