Answer:
B. Semicircle
Step-by-step explanation:
Semicircle means "half of a circle"
A minor arc is when the arc has a degree of <em>less</em> than 180°
A major arc is when the arc has a degree of <em>more</em> than 180°
If the degree is exactly 180°, then it's a semicircle. And it tells you the degree, which is 180°
