Loyalists opposed separation from England for several reasons, with the most prominent being their fear of a loss of property, concerns about mob rule, and a desire for stability and order in governance. Of the options you've provided, the strongest reason would be:
They feared a loss of property.
Loyalists believed that their assets and livelihoods would be threatened if they separated from the British Crown, as many had significant landholdings or businesses that relied on British connections.