Read the sentences.

Question

Oregon and California joined the United States. Interest in a transcontinental railroad increased.

Which sentence combines the two sentences by turning one into a subordinate clause?

Oregon and California joined the United States, and interest in a transcontinental railroad increased.

Oregon and California joined the United States; interest in a transcontinental railroad increased.

After Oregon and California joined the United States, interest in a transcontinental railroad increased.

Answer 1

- After Oregon and California joined the United States, interest in a transcontinental railroad increased.