Of the 4 groups of students, who scored the lowest in maths according to the survey（）

A．Because there weren’t any professional teams in the U.S. then.
B．Because Pele hadn’t retired from the Brazilian National Team yet.
C．Because this fast-moving sport wasn’t familiar to many Americans.
D．Because good professional players received low salaries.

A．They are equally competent for the job.
B．They both graduated from art schools.
C．They majored in different areas of art.
D．They are both willing to draw the posters.