Answer:
Correct answer is Wegener had no compelling mechanism to explain what would cause the continents to move.
Explanation:
A is not correct as through his researches he presented his theory to other scientist.
B is not correct as Wegener was very educated, and was even even working as a professor at University.
C is correct that although he presented his theory, he couldn't explain totally how it happened.
D is not correct as during his lifetime his theory wasn't widely accepted. That happened 20 years after his death.
<span>A. replacing private ownership with common ownership
</span>After World War II, Mao Zedong believed that improvements in farm production could be achieved only by replacing private ownership with common ownership.
NOT:
<span>B. conquering the island of Taiwan
C. replacing common ownership with private ownership
D. sharing power with the Nationalist party</span>
If i'm not wrong, it's true
I think it refers to worldwide mutual dependence between nations/countries as we depend on each other for the key things like food etc. on a worldwide level.