It can best be described as the writer's opinion
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Answer:
Standards of living of people around the world radically increased because for the first time trade was easier, safer, faster, more reliable and convenient. Goods could be shipped around the world and traded for other products.
Explanation:
Because children and dogs are still filled with a natural hope and expectation that their smile will be returned. They tend to make direct eye contact with you, looking right into you, just grinning away (unless, of course, they have been abused).”
A. don’t have to
The other ones either aren’t grammatically correct or don’t add up with the second part.
