Ciara is taking AP Biology and her twin brother, Elon, is in regular Biology. At the end of the year, Ciara earned a B and Elon earned an A. Which of the following is true?

Both Ciara and Elon earned the same number of points toward their GPAs.
Elon did not earn any points toward his GPA for taking this course.
Ciara earned more points toward her GPA than Elon.
Elon earned more points toward his GPA than Ciara.