The crash in Brent crude prices in 2014 and 2015 was particularly hard on jobs in the U.S. mining sector, including support services in oil fields that had ripple effects on construction and manufacturing, partly because American companies make much of the world’s mining equipment.

A) including support services in oil fields that had
B) which includes support services in oil fields, and had
C) which includes support services in oil fields that had
D) and support services in oil fields had
E) and support services in oil fields, which had


OA B

Source: Veritas Prep