B. Adverbs describe verbs (things that are actions). Being tall isn't something the basketball player is doing, it is a description of them as a person.
It is false that the connotations of a word have little effect on its literal meaning. Connotation are your personal feelings that a certain word evokes when you think about it/read it/write it.
For example, the word home means a house, but its connotation is usually positive - you connect it with love, warmth, etc.
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Your answer is assassin acording to my teacher