Colonists were looked at as second-class citizens, almost never being involved in their own rule. After several wars with native Americans and the French, the British began taxing the Colonists as reparations, which is where we get the phrase "Taxation without representation." Without the ability to represent themselves, colonists felt as if their rights were being infringed upon. Looking at the answer choices, C- Representation was a way that the colonists could participate in their government and protect their natural rights appears to be the best answer.
Let's take a look at the other options as well:
A: Representation was the key to becoming wealthy.
Although representation could help one become wealthy, it was not the main reason for the colonists to want it. Again, they wanted to have the ability to protect their rights.
B: Representation was promised by the Magna Carta .
The Magna Carta was only said that the king and government were not above the law, and had to follow it like everyone else.
D: Representation was an important tradition in English Law .
BAHAHAHAHAHA, this couldn't be further from the truth. At the time, only the Elite English were allowed to represent the nation and its people. If we look at any of the colonized lands by the British, not a single one was able to represent itself at the beginning, they had to fight their way to freedom.
This leaves us with the answer: C.
I hope I've helped!