about "comma",very important!

Two examples:

(1) TS3-38

The normative model of strategic decision-making suggests that executives examine a firm’s external environment and internal conditions and, using the set of objective criteria derived from these analyses, decide on a strategy.

The wrong anwser is as follows.

conditions, and they use the set of objective criteria derived from these analyses in deciding

Except the grammar error in using the "use ... in doing" .

(2) OG11-46

Long before it was fashionable to be an expatriate, Josephine Baker made Paris her home, and she remained in France during the Second World War as a performer and an intelligence agent for the Resistance.

大家有没有注意到，四个选项中只有D的逗号是在and后面的，是否因为如果and如果和前面的句子有逗号隔开的话，就不能省略主语了？

and如果被逗号隔开，接连的两个并列成分应该是两个完整的句子（就是B选项的结构），而and在逗号前的话，就应该连接句子中的两个动词：examin and decide

个别 现象吧