I thought back to my training and previous experience with Aspen Hysys. I knew that the Column module was used to design and simulate distillation columns, so I confidently selected answer B.

After submitting his exam, John anxiously waited for the results. A few days later, he received an email confirming that he had passed the Aspen Hysys User Certification Exam. He felt a sense of accomplishment and pride, knowing that his skills and knowledge had been validated by the leading software provider in the process industry.