{ 1 } - resting on special signs (including things like miracles) that show us that the Bible and Church Tradition contain God's revelation.
{ 2 } - involving feelings but no intellectual content.
{ 3 } - resting on a blind "leap of faith" without any intellectual justification.
{ 4 } - all of the above.
{ 5 } - none of the above.

Aquinas mentioned things like Jesus's miracles (including his resurrection) and the world's conversion to Christianity. Both of these are signs of God's presence.

Many contemporary theologians emphasize more how the content of the Christian faith appeals to our hearts and minds. This is taken to be a sign of its genuineness.