Question

What transition would best connect these ideas?

Many Americans thought trains too dangerous, even banning them from use. ________, Americans were building more railroad miles than canals in the 1830s.

However
Undeniably
As a result
for example

Answer 1

Your answer would be however, because they still made more railroads :(

Answer 2

However

Step-by-step explanation:

However, is used to express contrast about a statement said before. In this case, the contrast is that although the Americans believed that trains were too dangerous they still building more railroads than canals.

I hope this answer helps you.