9.  By the end of the 18th century, many educated Americans no longer professed traditional Christian beliefs. In reaction to the secularism of the age, ______ spread westward in the first half of the 19th century.
【正确答案】 D
【答案解析】 十九世纪上半叶，美国宗教复兴活动频繁出现；福音主义从这些活动中表现出来。