• (A) 条件(1)充分，但条件(2)不充分．
• (B) 条件(2)充分，但条件(1)不充分．
• (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
• (D) 条件(1)充分，条件(2)也充分．
• (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

What is the approximate distance between New York City and Montauk Point, Long Island
(1) Road map A shows that the distance from New York City to Hicksville is Approximately 15 inches, when 1 inch=1.3 miles.
(2) Road map B shows that the distance from Hicksville to Montauk Point is approximately 36 inches, when 1 inch=2.6 miles.

循证医学所要求的临床证据有以下3个主要来源，即 __________ 、 __________ 、 __________ 。