Answer:
stability of the US government.
Explanation:
The answer to your question is c
It would be the oasis and aquifers provide water to the people. In the arid places people tend to supply by travelling around the desert and stopping in areas that has oasis and aquifers in order to replenish their water supplies. Also oasis and aquifers become stopping posts if it is a trade route for merchants and travelers in the arid regions.
You need more information. The correct tone would be formal though
Speaker of the house can sit in the place of vice president
