They used democracy so every one voted on the next one in charge<span />
Answer: gas pipe lines
Explanation: There are three major types of pipelines along the transportation route: the gathering system, the interstate pipeline system, and the distribution system. The gathering system consists of low pressure, small diameter pipelines that transport raw natural gas from the wellhead to the processing plant.
Answer:
Sinking of American merchant ships
Explanation:
Its declared decision on 31 January 1917 to target neutral shipping in a designated war-zone became the immediate cause of the entry of the United States into the war.