Answer:
A). Most of the colonists took sides in the American Revolution; however, some remained neutral.
Step-by-step explanation:
The best way to merge/combine these two sentences is displayed through option A as it correctly links the two contrasting ideas with the use of subordinating conjunction 'however'. The use of 'however' prior to the dependent clause 'some remained neutral' indicates the disagreement or another side of the previous claim mentioned in the independent clause 'Most of the colonists took sides in the American Revolution'. Therefore, option A best reflects the most appropriate way to link the two sentences and offer an accomplished thought.