The three answers you should mark are: trips from one coast to the other took too much time to complete, it was difficult and dangerous to travel long distance by boat or by horse, and companies had no way to transport goods from one coast to another.
Basically the first and second, and forth you should mark.
Answer:
True
Explanation:
The repeated segments on the DNA strand are called VNTRs, or variable number of tandem repeats.
There are 3 grammatical errors. The first sentence: have you ever run in a relay race.
When you start a sentence, you need to start it with a capital letter. This sentence is asking a question, so you need to add a question mark.
A pronoun is a word that's used in place of a noun or noun phrase, like “he,” “she,” or “it,”
