Read the following paragraph from the section "Play Time Had A Small But Real Effect." "The fact that it's the electronic data collected from the device is very good, it's very objective," said Paul Croarkin, a psychiatrist at the Mayo Clinic in Minnesota. A psychiatrist is a doctor who studies illnesses of the mind. Croarkin has studied video gaming and children. He said he had "lingering questions" about the study and said the self-reporting nature of the survey was a weakness, but added that the researchers presented their findings in a balanced way.

Which selection from the article BEST supports the idea that electronic data is more reliable than survey data?

A. The research results are based on survey responses from people who are 18 and older.

B. Their responses were then matched up to the amount of time spent playing the games, which was provided by the game companies.

C. Still, experts who weren't involved in the research said it showed some strengths, such as accurately measuring game playing time.

D. We cannot say for sure that increased wellness was caused by playing the two video games.