Select the phrase/connector from the given three options which can be used to form a single sentence from the two sentences given below, implying the same meaning as expressed in the statement sentences. Pick out the option which when used to start a sentence combines both the above sentences in one.
A. There was observed a growth in the deregulation of airlines during the late 1970s on the watch of Democratic President Jimmy Carter.
B. Unionized truck drivers became independent contractors who unlike them did not collectively bargain for pay and benefits with employers.
I. Deregulation of airlines
II. Though the truck companies categorized that
III. Taking a worldwide perspective, independent truckers

Options

A. a. Both I and II
B. b.II and III
C. c.Both I and III
D. d. Only I