Which of the following is a run-on sentence? in 1783, the us congress ratified a preliminary peace treaty, the us and britain signed the treaty of paris, british troops left new york city, and george washington resigned as commander. on april 19, 1783, the us congress ratified a preliminary peace treaty, and the treaty of paris followed about five months later. on september 3, 1783, the us and britain signed the treaty of paris, and two months later, british troops left new york city. on april 19, 1783, the us congress ratified a preliminary peace treaty and five months later, the us and britain signed the treaty of paris and british troops left new york city in november.

The answer is D. On April 19, 1783, the US Congress ratified a preliminary peace treaty and five months later, the US and Britain signed the Treaty of Paris and British troops left New York City in November.

Explanation:

A sentence is classified as run-on if two or more ideas are included without proper punctuation or transitions to separate them which makes the sentences lack necessary pauses. This grammatical error occurs in the last option because a comma needed to be included between the sentence "The US and Britain signed the Treaty of Paris" and the sentence "and British troops left New York City in November" considering these two sentences are complete and independent. Therefore, this sentence is missing proper punctuation and thus, it is a run-on sentence.