A. An example of economic cooperation
Rocks are basically sand and gravel mixed together and, under high pressure, form hard, lasting objects.
Answer:
Explanation:
In 1854, amid sectional tension over the future of slavery in the Western territories, Senator Stephen A. Douglas proposed the Kansas-Nebraska Act, which he believed would serve as a final compromise measure. Without the support of slave-state Senators, the likelihood of completing the railroad remained very low.
