Respuesta :
The answer to your question would be that the underlined modifier is in the positive degree in the following sentence: Steel was used to make strong armor. That is, your answer would be B.
English adjectives and adverbs can have three degrees: the positive, the comparative, and the superlative. The positive degree is when the adjective or adverb in question is in its base form (such as in B). Sentence A is an example of the comparative (stronger) and C of the superlative (strongest).