单选题 In addition to the Mandarin dialects, there are six other Chinese dialect groups, spoken mainly in southern and southeastern China. This linguistic______, particularly in southeastern China, has provided the basis for strong regional identity and some ethnic variation within the larger Han community.
【正确答案】 A
【答案解析】解析：A项fragmentation意为“分裂，破碎”，根据空格处的意思“这种主要在中国东南部的语言分化”，故选A。B项unanimity“全体一致”；C项lethargy“无生气”；D项apotheosis“尊为神，神化，颂扬，崇拜，典范”，均不符合题意。