This is a question with answer options. Goal: How do you clean a dishwasher?

Which of the following methods is more reasonable for accomplishing this goal?

Choose from:
+ Start with an full dishwasher. Place a cup of white vinegar in a dishwasher-safe container on the upper rack of the machine. Run the dishwasher through a hot-water cycle.;
+ Start with an empty dishwasher. Place a cup of white vinegar in a dishwasher-safe container on the upper rack of the machine. Run the dishwasher through a hot-water cycle.;...I think the answer is
Start with an empty dishwasher. Place a cup of white vinegar in a dishwasher-safe container on the upper rack of the machine. Run the dishwasher through a hot-water cycle.