Suppose That One Premise of a Disjunctive Syllogism Is "Some

Suppose that one premise of a disjunctive syllogism is "Some forts are not well protected or these knights are amazingly good at capturing forts" and the conclusion is "These knights are amazingly good at capturing forts." What is the unstated premise?

A) Some forts are well protected.
B) All forts are well protected.
C) These knights capture forts.
D) These knights have captured some forts.
E) Poorly protected forts are easier to capture.