Given that 0 < a < b < c < d, which of the following the largest ?  Answers.
A) (c+d) / (a+b) B) (c+d) / (a+c) C) (c+d) / (a+q) D) (c+d) / (a+o) E) (c+d) / (a+f)
Explanation: Take a = 1, b = 2, c = 3, d = 4. option A is clearly true.   Sol: (c+d) / (a+b)
<result>A</result>
Given that 0 < a < b < c < d, which of the following the largest ?