Answer:
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Answer:
A vacuum breaker is an attachment commonly placed on a bibcock valve or toilet or urinal flush valve, that prevents water from being siphoned backward into the public drinking water system. This prevents contamination should the public drinking water system's pressure drop.
Explanation:
<span>C.<span>Janine should increase the intensity or length of her exercise programs because it is more difficult to maintain high fitness levels as you age.</span></span>