Your drill results should be reflected in your analytics. Potentially, they could come with a checkbox to include them, so users could continue to view analytics for just PrepTests, or decide to include the results of drills in their analytics along with the Preptests.
I find it hard to accurately judge which questions I struggle on the most since the analytics only reflect questions taken in full PrepTests. If you are getting a question type wrong in drills and right in PrepTests, why should that data be left out? Adding a checkbox to include drill results would be the best of both worlds. You can see what you are getting wrong generally, with drills and Preptests, while also still being able to see only the types of questions you struggle on in actual testing environments.
I understand that this is potentially something that could be harder to code on the site (really I have no idea, I don't know anything about computer science), but I think this could make the experience of using 7sage much better and lead to more accurate analytics if it has the option to include all the questions a user takes, whether drill or Preptest.
The thing that was getting me on this one though is the fact that it says if some babies understand all the words they utter. I felt like that was too strong and didn't choose it because even if babies understood some of the words they uttered wouldn't the conclusion in that answer still be true? This is what is confusing me.