question:  Why would the psychologists be surprised to see Read blow up the tank?
context: Illustrated by Schoenherr Read locked the door and drew his pistol. If Umluana noticed Read's gun, he didn't show it. Two men with rifles plunged into the gas; sighing, they fell to the floor in a catatonic trance. A grenade arced from the bushes and the pursuers recoiled from the cloud that rose before them. In a few minutes Miaka Station will know we're coming. Two types of recruits are accepted by the UN Inspector Corps: those with a fanatic loyalty to the ideals of peace and world order, and those who are loyal to nothing but themselves. It was the home of factory workers, clerks, semiskilled technicians, all who do the drudge work of civilization and know they will never do more. Trained to use small arms and gas weapons, they guarded certain borders, bodyguarded diplomats and UN officials, even put down riots that threatened international peace. Read went through six months training on Madagascar. Rather than resign, he accepted punishment which assigned him to weeks of dull, filthy extra labor. One power implied in the UN Charter no Secretary General or Inspector General had ever tried to use. Could the World Court try and imprison a politician who had conspired to attack another nation? China called the uproar a vicious slur on a new African nation. The United States and Russia, trying not to get entangled, asked for more investigation by the UN. If he got away with it, some larger and more dangerous nation might follow his precedent. They would enter Belderkan, arrest Umluana and try him by due process before the World Court. If the plan succeeded, mankind would be a long step farther from nuclear war. But then they would have spent hours flying over Africa, with Belderkan fighters in hot pursuit, other nations joining the chase and the world uproar gaining volume. From Miaka they would transmit to the Belderkan Preserve, a famous tourist attraction whose station could transmit to any point on the globe. They planned to get there before it could be defended. "There's no military base near Miaka," Rashid said.
output:  Read's psych tests said he was only driven by pride.
options:  Read's psych tests said he only cared about himself.  Read's psych tests said he would likely fall apart under pressure.  Read's psych tests said he was only driven by pride.  Read's psych tests said he was a coward.