The type of primary election most conducive to strong political parties is the closed primary.
Answer: The age of the stars in the system.
Explanation: All stars have different ages; Stars take on certain forms depending on their age, causing a difference in their looks. Thus making #3 as your answer.<em><u> ( The age of the stars in the system)</u></em>
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"If they are used ocassionally, antiacids don't produce any risk. But used daily, they can cause a "rebound" reaction: heartburn pain can actually worsen and some people experience diarrhea or constipation from certain antiacids."