Your answer is C. agreed to by Congress in 1777; ratified in 1781
Ecology is the study of interactions between the environment and living creatures.
Workers who have organized into unions have much more power to make changes than workers acting on their own. This power can be used through collective bargaining to negotiate improved wages and working conditions. The option of calling a legal strike, should negotiations fail, makes it much more likely that worker demands will be met.
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Three way's California changed because the gold rush was, California gained population, causing a permanent change in government. Also, San Francisco became the center of banking, shipping, trade, and manufacturing. Most important, because of California's new grand population, California became a free state in 1850. The Gold Rush significantly influenced the history of California and the United States. It created a lasting impact by propelling significant industrial and agricultural development and helped shape the course of California's development by spurring its economic growth and facilitating its transition to statehood.
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