Rectangle \(ABDC\) is perfectly inscribed inside a circle and has an area of \(40\) square inches. What is the length of minor arc \(CD?\)

(1) The sum of the measures of angle \(m\) and angle \(n\) is \(60\) degrees.
(2) The sum of the measures of angle \(j\) and angle \(n\) is \(90\) degrees.

Answer: A

Source: Veritas Prep