although horses evolved in north america their are many different opinions as to why no horses existed on this continent at the
time of european exploration. spanish explorers reintroduced horses to north america beginning in the late fifteenth century
horses continued to be released onto public lands by the u. s. cavalry; farmers, ranchers, and miners.
select one:
a. no change
b. although horses evolved in north america, there are
c. although horses evolved in north america there are
d. although horses evolved in north america, they're

B). Although horses evolved in North America, there are

Explanation:

The reason why answer choice "B). Although horses evolved in North America, there are" is the correct answer because this answer choice would be grammatically correct and uses the right form of "there."

This sentence is grammatically correct because the comma is right after the complete thought, which allows the reader to make sense of the sentence.

This sentence also uses the right form of "there." There is used to describe something that's somewhere. There could also be known as "here." So you could read it out as "here" are many different opinions as to why no horses existed on this continent at the time of European Exploration, and then examples are given after.

"A). No change" is incorrect because the sentence would be considered a "run-on sentence" and uses the wrong "there." It uses "their" instead of "there," in which it describes the sentence wrong.

"C). Although horses evolved in north America there are" is incorrect because this sentence is also a "run-on sentence" and doesn't capitalize North. North has to be capitalized since it's describing a place, North America.

"D). Although horses evolved in North America, they're" is incorrect because it also uses the wrong "there." The word "they're" is another word for "they are," in which it makes no sense in the sentence. "Although horses evolved in North America, 'they are' many different opinions.." You can see how it makes no sense.