What supports this passage is that Texas and California were under control by Mexico until the land was fought for. That is why America couldn't annex it.
In 1850s, the main occupation of the people arriving in Oregon and California is gold mining. Thus, the answer is letter B. In May of 1848, a newsletter proclaimed about the gold mines found in the lands and many people from the neighboring places flocked to the place.
The newspaper mail provided the news to the colonist.
Great Britain did. They sought to expand its territory in the world and so they colonized India in the mid 1700’s and had influences in China.
Answer:
His reorganization of the fiscal, administrative, and military machinery of the empire laid the foundation for the Byzantine Empire in the East and temporarily shored up the decaying empire in the West. The last major persecution of Christians occurred during his reign.