Final answer:
The FALSE statement about the southern colonies is that they had harsh winters. The southern colonies actually experienced mild winters, which allowed for a longer growing season and significant agricultural production.
Step-by-step explanation:
The statement about the southern colonies that is FALSE is (d) Southern colonies had harsh winters. The southern colonies, which included Virginia, Maryland, South Carolina, North Carolina, and Georgia, were known for their mild winters compared to the northern colonies. This climate allowed them to have a longer growing season for crops such as rice, indigo, and salt pork, which they exported often to the Caribbean colonies.
The colonial assemblies during the eighteenth century expanded their power and influence, contrary to the idea that they included colonists from all social classes as suggested in option (b). Also, it is true that the colonial governors possessed the right to veto legislation passed by the colonial assemblies, reinforcing the notion that the assemblies were not purely democratic and did not represent all social classes equally.