Answer:
A.
The Silk Road connected China to the Mediterranean Sea.
It demonstrated that even a president is subject to the law.
<span>The idea that even if something is out of sight, it still exists is called object permanence.
This is something that is developed in humans over time - young children still don't have the notion of object permanence. This is why peekaboo games work well with children - because when you hide your face, the child doesn't know it is still there behind your hands because there is no concept of object permanence yet. </span><span /><span>
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