Which of the following is untrue regarding Progressive Alignment Method?

• A. Progressive alignment depends on the stepwise assembly of multiple alignment and is heuristic in nature
• B. It speeds up the alignment of multiple sequences through a multistep process
• C. It first conducts pair wise alignments for each possible pair of sequences using the Needleman‚Äö√Ñ√∂‚àö√ë‚àö¬®Wunsch global alignment method and records these similarity scores from the pair wise comparisons
• D. Its drawback is it slows down the alignment of multiple sequences through a single step process