Stan and Oliver, famous psychologists, are interested in determining how fast people can respond to ...

Stan and Oliver, famous psychologists, are interested in determining how fast people can respond to a signal flashed on a computer screen. At the start of each trial, the computer displays a Get Ready sign, then the screen goes blank. After a short delay, the signal is flashed on the computer screen and the subject presses a key as quickly as possible. In condition one, the duration of the short delay is always the same length of time. In condition two, the short delay changes randomly from trial to trial. According to research in high-speed decision making, the subjects in condition one are ____ than those in condition two because of ____.
 
  a. slower; complexity
  b. slower; stimulus-response compatibility
  c. faster; expectancy
  d. faster; speed-accuracy tradeoff