The answer is true. Sexism: an approach or behavior that discriminates in contradiction of one sex, usually women, based on the presumed superiority of the other sex. It has been connected to typecast and gender roles and may include the belief that one sex or gender is basically superior to another. Sexism can upset anyone, but it is particularly recognized as affecting women and girls.
An open primary is a primary election that does not require voters to be affiliated with a political party in order to vote for partisan candidates. In a traditional open primary, voters may select one party's ballot and vote for that party's nomination.
Troops from the two Koreas have violent clashes.
Actually both a) and b) are correct.
About A): the two groups should be identical (but not the same, i.e. have the same attributes), only the treatment of them - the independent variable should be different.
But the one option to choose is b: The control group is identical to each test group except for one variable. This is the independent variable.
