The Klondike Gold Rush significantly affected Washington in several ways, most notably through the growth of Seattle. When gold was discovered in the Yukon in 1896, many fortune seekers traveled to the region, often starting their journey from Seattle, which became a major port for those heading to the gold fields. This influx of prospectors and the economic activity surrounding their travels contributed to Seattle's rapid growth and development as a city during this period.
While Tacoma also experienced some growth due to its proximity to the gold rush, it was primarily Seattle that benefited the most as a shipping and supply hub for those seeking riches in the Klondike.
So, the most accurate statement regarding the impact of the Klondike Gold Rush on Washington would be: People set sail for Canada from the port of Seattle, helping Seattle grow.