Which+is+the+most+important+element+in+writing+a+formal+complaint+letter?+ A. an+engaging+tone+ B. elaborate+details+and+imagery+ C. correct+grammar,+punctuation,+and+spelling+ D. a+clear+statement+of+purpose+with+supporting+evidence
All of them are important but a clear statement of purpose with supporting evidence is the most important because you want the person your complaining to to know what your complaining about.
