Subordination means that one clause to another establishes that one idea depends on another in some way: a chronological development, a cause-and-effect relationship, a conditional relationship, etc. A participial phrase will begin with a present or past participle. To use them as a method of subordination, the participial phrase modifies the subject of the sentence, usually set out from the rest of the sentence with a comma. This is represented by the first option<em> “A. Walking along the wet street, David avoided the puddles” </em>from the ones given, due to the fact one sentence implies the other, starts with the present participle and both ideas are linking by a comma.
