3.)Which answer best shows an effect of British soldiers firing upon colonists in Boston, killing five of them?

The first shots of the American Revolution are fired, which officially starts a war between the colonies and Britain.

The Sons of Liberty protest by dumping tea into Boston Harbor, which becomes known as the Boston Tea Party.

Samuel Adams uses propaganda about the event to gain colonial support for the Patriots in their fight against the British.

Delegates meet at the First Continental Congress to demand that Britain repeal the Coercive (Intolerable) Acts.

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C. Samuel Adams uses propaganda about the event to gain colonial support for the Patriots in their fight against the British.

The answer that best shows an effect of British soldiers firing upon colonists in Boston, killing five of them is:

"Delegates meet at the First Continental Congress to demand that Britain repeal the Coercive (Intolerable) Acts."

To determine this, let's break down the other options:

1) "The first shots of the American Revolution are fired, which officially starts a war between the colonies and Britain." - This option may seem logical, but the event described in the question is actually considered a part of the American Revolution, not the start of it.

2) "The Sons of Liberty protest by dumping tea into Boston Harbor, which becomes known as the Boston Tea Party." - This option refers to a different event, the Boston Tea Party, where colonists protested taxation without representation.

3) "Samuel Adams uses propaganda about the event to gain colonial support for the Patriots in their fight against the British." - This option does not directly address the effect of British soldiers firing upon colonists in Boston.

Therefore, the correct answer is that delegates meet at the First Continental Congress to demand that Britain repeals the Coercive (Intolerable) Acts. This meeting was a response to the escalating tensions between the colonies and Britain, including the event described in the question. The delegates sought to address the issues caused by the Acts and find a resolution with Britain.

Correct.