Final answer:
Coarticulation results in allophonic variations and controversy over phoneme pronunciation. Allophonic variations mean phonemes are pronounced differently in different contexts, and disagreements can arise on correct pronunciation among speech communities.
Step-by-step explanation:
Coarticulation results in several phenomena that influence how speech sounds are produced and perceived, including allophonic variations and potential issues regarding the correct pronunciation of phonemes. Allophonic variations occur because the production of one sound is influenced by the preceding and following sounds, leading to different pronunciations of the same phoneme; these variations do not generally lead to misunderstandings. Lastly, coarticulation can contribute to disagreements or controversy about how to pronounce specific phonemes correctly as different speech communities may have different ways of realizing the sounds.