Detective: People who repeatedly commit crimes like embezzlement or bribery without being caught tend to become more confident. With each success, they believe that getting caught is less likely. However, the more crimes a person commits, the greater the chance that one of those crimes will be solved. It is ttherefore likely that most people who commit embezzlement or bribery will eventually be caught. Which one of the following is an assumption required by the detective's argument? ['The majority of people who commit embezzlement or bribery do so repeatedly.', 'People who commit embezzlement or bribery tend to be people who feel confident.', 'People who repeatedly commit embezzlement or bribery become more and more careless the longer they avoid detection.', 'Embezzlement and bribery are more likely to be solved than are many other types of crimes.']