Answer:
<em>C. It led to concerns regarding the dangers of greenhouse gases.</em>
An early traveler to China was B. Marco Polo
"People without ability or experience became officials" is some way political machines hurt cities.
<u>Explanation:</u>
A political machine is a collective where an influential leader or small group commands the resources of a supporter and business community that earns incentives for their actions. This success is based on the manager or group's ability to get out the vote on election day for their representatives.
In the late 19th century, many machines emerged throughout towns to serve U.S. immigrants who regarded machines as a means for political conquest. Often, political patronage may involve exchanging money for political assistance.
I would say c limited slave trade between Africa and the colonies :)
- All of these three civilizations continued to develop more political and governmental unity.
<span>- China and Europe were looking back to their roots, Europe grew them a little further, and China turned back to them. </span>
<span>- Islam and Europe both worked to expand their religions, and to grow their land land and control. China did not. </span>
- China and Europe both started to explore the water, for different reasons though. Europe gained more by finding the Americas.
<span>- Islam was split into four parts, a little similar to Europe's fragmented states. China was a completely unified empire.
Please put me as brainlest if this is right!</span>
