Final answer:
Anabaptists used the principle of sola scriptura to interpret the Bible for themselves, which led to their rejection of infant baptism in favor of adult baptism.
Step-by-step explanation:
The Anabaptists followed the principle of sola scriptura by interpreting the Bible for themselves. This allowed them to come to the conclusion that only adults could make the conscious decision to become Christians, resulting in their rejection of infant baptism and their advocacy for adult baptism. As a result, the correct answer to how Anabaptists used sola scriptura is b) Anabaptists followed sola scriptura by interpreting the Bible for themselves and rejecting infant baptism.
Anabaptist groups like the Hutterites, Mennonites, and Amish also advocated for the separation of church and state and were often pacifists, which led to conflicts with European rulers and even violent attacks against them.