A. until the 1800s, there was no such thing as standard time B. In the United States, for instance, there were over 300 different time systems.

C. so, to take train travel possible, the world was divided into time zones, and times were standardized.

D. why did this change? railroads.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."

the correct answer is c - emmett dalton was badly wounded.

a complete predicate includes a verb or verb phrase as well as words that give more information about it. to identify a complete predicate, you need to find out what the subject is or does.

in this example, emmett dalton is the subject. what happened to emmett dalton? he was badly wounded.

i believe the correct answer would be d.   saying that he was robbed of track, makes it seem like he's blaming the school for not being able to keep the track program.   hope this !

-ttl