20. choose the sentence below that shows correct use of subordination: a. if politicians need to be willing to compromise, before they can make any progress. b. politicians need to be willing to compromise, before they can make any progress. c. before politicians can make any progress they need to be willing to compromise. d. before politicians can make any progress, they need to be willing to compromise.

D. Before politicians can make any progress, they need to be willing to  compromise.

Explanation:

Before is a subordinating conjunction, so the clause it is included in cannot stand alone and needs to join an independent clause in order to make sense. In this case, the subordinating clause "Before politicians can make any progress" is linked to the independent clause "they need to be willing to  compromise" to form a complex sentence with a comma separating the clauses.

the maximum speed limit is 55 mph on a two-lane undivided highway and for vehicles towing trailers.

this doesnt make any sense imao