某社交类应用上线初期用户增长缓慢，但后期因口碑传播实现用户量激增。这一现象最符合产品生命周期的哪个阶段特征？

答案解析

核心考点：产品生命周期各阶段特征。解题思路：题目描述『初期增长缓慢』对应导入期，但『后期因口碑传播实现激增』明确指向成长期的核心特征（快速市场扩张）。选项分析：A仅对应前半句，B完整匹配描述；C对应稳定期，D与增长趋势矛盾。易错点：容易混淆初期缓慢增长与导入期的关系，但关键差异在于是否有爆发式增长阶段。
正确答案：B
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