Considering the available options, the statement about help received by the Patriots from other nations during the American Revolutionary War that is false is:
"Mexican ships attacked the British naval blockade."
This is because at the time of the American revolution War which lasted about between 1775 to 1783, the country Mexico to not in existence then.
However, the Patriots got helped from foreign countries, some of which include the following:
The French help through military and food aids.
The Polish assistance, under the famous TadeuszKosciuszko, a Polish Engineer
Spanish and Dutch financial assistance
Hence, in this case, the correct answer is option C. "Mexican ships attacked the British naval blockade."
Causes of the American Revolution were that the British Government set taxes on goods for the American Colonies to pay without the consent of the American people themselves. The Result was that the American Colonies gained independence for the British Empire.
