By 1840, the temperance movement in the United States had

A) united Americans of all classes and religions in a "war" against alcohol.
B) virtually disappeared.
C) convinced Congress to pass a national prohibition law.
D) made no measurable impact on Americans' drinking habits.
E) encouraged a substantial decrease in the consumption of alcohol.

By 1840, the temperance movement had indeed made significant progress in reducing alcohol consumption among Americans. The movement, which advocated for moderation or complete abstinence from alcoholic beverages, gained momentum throughout the 19th century, leading to a noticeable decline in alcohol consumption rates. This was achieved through various means, including moral persuasion, public campaigns, and the establishment of temperance societies. While it did not unite all Americans or lead to immediate national prohibition laws, its influence was significant in changing attitudes and behaviors regarding alcohol consumption.