The main effect of the Second Great Awakening on American social values was that people

a. tried to reform and improve society.

b. tried to convert nonbelievers to Christianity.

c. began to criticize others publicly for bad behavior.

d. began to drink more alcohol.

The answer is A. The Second Great Awakening was a religious revival movement of the Protestant Christianity in the United States that began in the early 19th century which preached salvation that was to be provided by the institutions. This period was characterized by social reform. People massively participated and were engaged in various religious and social movements in order to reform the society.