Look at the chart and read the paragraph then answer the question. What most likely happened as a result of changes to San Francisco's population?

A. San Francisco became a major urban area as a result of the Gold Rush and continues to grow.

B. San Francisco’s economy stalled because gold was not a strong form of money.

C. California was denied entry into the Union until San Francisco’s population settled.

D. San Francisco's economy stalled as a result of too many people and not enough jobs.