To combine the sentence "<em>Most colonists took sides in the American Revolution"</em> with the sentence <em>"Some remained neutral"</em> is necessary a linking word that expresses a <em>contrast or that seems to disagree with was mentioned</em> <em>before:</em> however (<em>despite this</em>). Introducing the new independent clause with <em>a semicolon + however + a comma.</em>
C is the correct answer because when you are writing a list of items you use commas to separate items. " Johnny had to buy milk, eggs, and bacon for his mother "