If 0 < c< 1 < d, which of the following must be true? Choose one
A) 1 < 1/c< 1/d
B) 1/c< 1 < 1/d
C) 1/c< 1/d< 1
D) 1/d< 1 < 1/c
E) 1/d< 1/c< 1
0&lt;c&lt;1&lt;d. Let c=1/2 and d=2   Substituting values:   A. 1&lt;2&lt;1/2 ---Wrong   B. 2&lt;1&lt; 1/2 ---Wrong   C. 2&lt;1/2&lt;1 ---Wrong   D. 1/2&lt;1&lt;2 ---Correct   E. 1/2&lt;2&lt;1 ---Wrong   Hence answer is 1/d&lt; 1 &lt; 1/c
<result>D</result>
If 0 < c< 1 < d, which of the following must be true?