it cost to much money
The possible explanation is that the Chinese thought that overseas exploration may violate Confucian principles. Another reason is that the Chinese wanted to preserve their traditions intact.
Overseas markets appeal to many Americans. One possible explanation for this is the fact that overseas markets can look a lot cheaper.
A possible explanation is called a hypothesis.
"To one who has faith, no explanation is necessary. To one without faith, no explanation is possible." ― St. Thomas Aquinas
No, that wouldn't be possible. You would have to get a Wii from the overseas region.
There are quite a few devices that have made sea exploration as you know it possible. Submarines are one of these devices.
A hypothesis.
Hypothesis
conclusion
A hypothesis.
A hypothesis
If more than one explanation is possible, a conclusion about one of them cannot be reliable