Professor Wii is studying whether playing video games that require mental rotation of visual images fosters success on spatial reasoning test. The best method for Professor Wii to use to be able to infer a cause-and-effect relationship would be to:

The best method for professor Wii is to randomly divide the group in two subgroups and choose one group of children to play no video games and one to play video games and then compare the spatial reasoning measure for each of the subgroup.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.

barack obama

i love this guy