Final answer:
There are 26 sororities under the National Panhellenic Conference, not 5, 10, 15, or 20 as proposed in the options. Additionally, approximately 25 percent of countries have a unicameral legislature.
Step-by-step explanation:
The number of sororities under the National Panhellenic Conference, commonly referred to as the Panhellenic Association, is actually 26. None of the options provided (5, 10, 15, 20) are correct. The National Panhellenic Conference is known for being one of the largest organizations advocating for women and sororities, and its member groups are among the oldest and largest women's organizations in the United States and Canada. In regards to the approximate percentage of countries in the world with a unicameral legislature, the correct option is b) 25 percent. A unicameral legislature is a type of government in which a single legislative or parliamentary chamber holds the power to make and pass laws. This contrasts with a bicameral legislature, which has two separate chambers, usually an upper and a lower house, both involved in the law-making process.