Concept:A sentence-completion item needs the full sentence to be selected.Explanation:The words given are all connectives or adverbs that follow different grammar patterns.For example, "whenever" indicates time, "whichever" and "whatever" indicate choice, and "however" indicates manner.The sentence with the blank is not supplied in this question.Without that sentence, the correct option cannot be identified.Answer:The correct answer cannot be determined from the information provided.