To cope with the 50 percent price plunge, companies laid off thousands of workers, focusing their rigs on the biggest gushers only and using cutting-edge technology to squeeze all the oil they could out of every well.
A) To cope with the 50 percent price plunge, companies laid off thousands of workers, focusing their rigs on the biggest gushers only and using cutting-edge technology to squeeze all the oil they could out of every well.
B) Coping with the 50 percent price plunge and laying off thousands of workers, focused their rigs on the biggest gushers only, companies used cutting-edge technology to squeeze all the oil they could out of every well.
C) To cope with the 50 percent price plunge, companies laid off thousands of workers, focused their rigs on the biggest gushers only and used cutting-edge technology to squeeze all the oil they could out of every well.
D) In order to cope with the 50 percent price plunge and lay off thousands of workers, companies focused their rigs on the biggest gushers only and used cutting-edge technology to squeeze all the oil they could out of every well.
E) In order to cope with the 50 percent price plunge and lay off thousands of workers, companies focused their rigs on the biggest gushers only and used cutting-edge technology to squeeze all the oil the companies could out of every well.
I went for A and I am not totally convinced with the correct answer choice C.
For C to be the right answer, it needs "," in between "only" and "used". The correct usage form of listing verbs is "A, B, and C".
Can someone help me to understand?