Task: Question Understanding
Input (English): Question: Jeff designed an investigation to determine what type of popcorn popped the most kernels. He conducted his experiment and graphed the results. What should be done to make a more valid conclusion? (A) Do research (B) Write a journal entry (C) Test the same type of popcorn each time (D) Conduct the experiment again?
Output (English): investigation, determine, type, popcorn, popped, kernels., conducted, experiment, graphed, results., valid, conclusion?