The correct answer is A. armored, more quickly, weakest.
In the sentence, the adjective <em>armored </em>is used in its base form, that is to say, in its positive degree. The second modifier, <em>more quickly,</em> is used in its comparative degree since the use of the structure <em>more… than </em>signals the comparative form of the adjective. Finally, the third modifier, <em>weakest</em>, is used in its superlative degree because it is an adjective that compares a whole group of people, and the <em>–est</em> ending is the suffix that indicates the superlative form.