input: Text: One can't be too cautious about the people one meets in Tangier. They're all weirdies of one kind or another. Me? Oh, I'm A Stranger Here Myself By MACK REYNOLDS The Place de France is the town's hub. It marks the end of Boulevard Pasteur, the main drag of the westernized part of the city, and the beginning of Rue de la Liberté, which leads down to the Grand Socco and the medina. In a three-minute walk from the Place de France you can go from an ultra-modern, California-like resort to the Baghdad of Harun al-Rashid. It's quite a town, Tangier. King-size sidewalk cafes occupy three of the strategic corners on the Place de France. The Cafe de Paris serves the best draft beer in town, gets all the better custom, and has three shoeshine boys attached to the establishment. You can sit of a sunny morning and read the Paris edition of the New York Herald Tribune while getting your shoes done up like mirrors for thirty Moroccan francs which comes to about five cents at current exchange. You can sit there, after the paper's read, sip your expresso and watch the people go by. Tangier is possibly the most cosmopolitan city in the world. In native costume you'll see Berber and Rif, Arab and Blue Man, and occasionally a Senegalese from further south. In European dress you'll see Japs and Chinese, Hindus and Turks, Levantines and Filipinos, North Americans and South Americans, and, of course, even Europeans—from both sides of the Curtain. In Tangier you'll find some of the world's poorest and some of the richest. The poorest will try to sell you anything from a
  Question: Why does Paul think an alien wouldn't be able to hide on Earth?
  
   (A) Aliens don't look like Earthlings.
   (B) An alien would not be able to mimic a human enough to fit in with society.
   (C) An alien wouldn't be able to assimilate into Earth's backward culture.
   (D) The Earth has so many intelligence agencies, at least one would be watching when an alien gave itself away.
  Answer:
output: The Earth has so many intelligence agencies, at least one would be watching when an alien gave itself away.