Which of the following was a city that began as a lumber mill and became the largest city in eastern Washington?

A. None of the above

B. Pasco

C. Walla Walla

D. Tacoma

The correct answer is A) none of the above.

The city that begun as a lumber mill and became the largest city in Eastern Washington is: "none of the above."

None of the cities mentioned as an option fit the characteristics stated in the question. The cities in the Eastern Washington territory began as small settlements that due to farming and trade were growing until more people came and settled in.

None of the cities listed here fit that description.