The correct answer is C.
Proprietary colonies were one of the types of British colonies established in North America. The owner of the land was the British King but, in order to focus on governing England, he transfers the power of governing a colony to one of his allies.
In the case of Maryland territories, he named George Calvert as the Lord of Baltimore. Anyway, the first colonial governor of Maryland was George's son, as George died 5 weeks before.