Colleges' investment incomes are the red dots, and the tuition incomes are the green dots. For how many colleges is the red dot twice as high as the green dot? Well, for the far left college, that red dot is very high, and the green dot is relatively low, so that red dot is definitely more than twice as high as that green. Take a look at the next--red dot at around $460M and green at around $250M, so the red dot falls short of twice as high as the green, so this one doesn't count. Take a look at the next--red dot at around $520M and green at around $260M, so arguably, the red dot is almost exactly twice as high as the green, but not more than twice as high, so this one doesn't count either.

Then for the next schools, the green dots are considerably higher, more than half the height of the red dot, and after, the remaining schools have green dots higher than the red dot--none of these can possibly count.

Therefore, the only college to satisfy this condition is the one on the far left. Answer = (B).