老年多发性腹股沟斜疝，最好的手术方法是（）

A.单纯疝囊高位结扎术

B.巴西尼（Bassini）法

C.佛格逊（Ferguson）法

D.麦克凡（McVay）法

E.内环修补法

Manila lines in which the strands are right-hand laid（）.

A.should be coiled in a clockwise direction

B.should be coiled in a counterclockwise direction

C.may be coiled either clockwise or counterclockwise

D.should never be coiled