2. Clara is helping another student analyze the results of an investigation. Her classmate wanted to see how long drinks would stay cold in different insulated cups. Clara does not know what the hypothesis was, but does know the data that the other student collected She reviews the results of the other student's investigation, which are shown in the chart below. Her classmate asks Clara to summarize the results and offer her conclusion. What is the best answer Clara could give?
A. The plastic cup insulates better than the ceramic cup.
B. Other materials, such as a paper cup, will insulate better.
C. The ceramic cup insulates better than the plastic foam cup.
D. The investigation was inconclusive and the student should throw out the results.