频率副词描述周末活动安排 — 英语选择题

Liu Tao 记录了自己一个月（4个周末，每个周末2天）的活动：他每个周六都去图书馆；周日只在第1个周末去了公园，其余周日在家看书。下面哪句关于他周末活动的说法是正确的？ A. He always goes to the library at weekends. B. He sometimes goes to the park at weekends. C. He never reads books at weekends. D. He usually goes to the park at weekends.