这是现在分时做条件状语表示一般性、普遍性规律的陈述,早点起床并且散一下步,一天都能保持精力充沛这两个动作之间没有先后顺序之分,比较一下下面两个句子:
1、having gotten up too late,he was late for school this morning.(某一次特定的时间)
2、getting up early,he is always the first one to arrive at the school.(一般性的成规律的动作)
况且B本身就有错误不应该是having got,而应该是having gotten.