Question

Many___were advocates for reform during the 1800s?

Answer 1

I think it was Protestants because protestants were looked down upon in Europe in the 1800s 

Answer 2

Many Protestants were advocates for reform during the 1800s.

Several members of specific religious groups or churches were advocates of reform during the century.  The 1800s were a period of change for the United States. A sense of nationalism was spread across the entire nation.

Protestantism constitutes the second largest form of Christianity with collectively between 800 million and more than 900 million adherents worldwide or nearly 40% of all Christians.