The sale of alcohol was first prohibited in Washington by A: Governor Rogers in 1896.
B: the state’s voters in 1914.
C: the passage of the Nineteenth Amendment.
D: an act of Congress.

B. The state's voter in 1914

Explanation:

On November 3, 1914, after prodigious Anti-Saloon League lobbying efforts statewide, Washington voters approved Initiative Measure Number Three, prohibiting the manufacture and sale (although not the consumption) of liquor statewide.

the answer is b. hope this !