The answer you're probably looking for is:
The Stamp Act of 1765 was significant in the sense that it was the first direct tax imposed on American colonists (So,
would most likely be the answer that you're looking for to this question, that you have asked

For independence because Britain was taxing the colonists too much, was passing too many acts oppressing the colonists, and even killed some colonists (Boston Massacre).
Answer:
I believe it is the letter B
They would probably study a development of trade, Among others.