单项选择题

A、E-75优质钻杆,抗拉强度=141,000kg(311,200lbs)
B、任何一种钻杆均可.
C、S—135优质钻杆,抗拉强度=254,000kg(560,100lbs)
D、G—105优质钻杆,抗拉强度=198,000kg(436,150lbs)
E、X—95优质钻杆,抗拉强度=179,000kg(394,200lbs).