California Gold Rush and Manifest Destiny

In the 1840s, the concept of Manifest Destiny became a motivating force for American expansion in North America. This belief was tied to a variety of social, political, and economic desires, leading to pivotal events such as the annexation of Texas and the Oregon Trail migration. Advocates of Manifest Destiny believed that it was the nation's divine right to expand its territory and spread democracy and civilization. Which of the following events was most directly influenced by this ideology?