Choose the Sentence in Which Every Adjective and Adverb Is

Choose the sentence in which every adjective and adverb is correct. Select the letter of the correct answer. In which sentence is every adjective and adverb correct?

A) Jordan could tell that Keisha was being careful by the way she slowly walked up the stairs.
B) Jordan could tell that Keisha was being carefully by the way she slowly walked up the stairs.
C) Jordan could tell that Keisha was being careful by the way she slower walked up the stairs.