Why is it critical to add the bill of rights to the us constitution?

Options:

A) The state and federal governments would not have been able to coexist.
B) People were concerned that the government would infringe on individual freedoms.
C) Local governments were worried that they wouldn't have any power.
D) There was a need for each branch of government to "check" the others. 

The answer is option B "People were concerned that the government would infringe on individual freedoms." The bill of rights are article's that give people there induvial rights and so people thought that the government would change those rights therefore changing laws that had to be followed. Bill of rights contain amendments that could not be change said but the original founding fathers of our country. Even though they can't, it's still possible.

Hope this helps!