I got stuck between C and D for this questions. I liked C, the correct answer, the best upon first reading it but got hung up on where the answer states "most individual members". We are not given how many people are surveyed so we don't know if most members were surveyed. Went with D ins...

This one was tough. I can kind of see how B is the answer, but it seems weak to me?

Thank you! Helped a ton!

C is right because it gives us an alternate cause for why most students ended up increasing their achievement levels after finishing the program. If you try and argue with the author here, then I think you'll see why this is right: Author: "Most of the kids who completed the chess program saw i...

I am wondering why D is correct. If we negate D, then some of the students who are least enthusiastic are among the students most committed to being science major. However, it could be the case that these students did not pass the course, but those least enthusiastic and least committed students pa...

B says that only those children with better achievement at the beginning of program completed it. So it should weaken the arg because the children who showed increase in achievement after completing the program were better to begin with. Thus, program may not have anything to do with their increase...