In a football game a touchdown is worth 6 points, an extra pint is worth 1 point, and a field goal is worth 3 points. Suppose that in a game the only scoring done by teams are touchdowns, extra points and field goals. If a team scored 66 points with 6 touchdowns and 6 extra points, how many field goals were scored? A) 9 B) 8 C)7 D) 6