Context: The next thing I knew we were at the Big Dam Bridge . Walking up it is quite a bit easier than running or cycling up it , I assure you . Ha !
Question: Why is it easier to walk up the Big Dam Bridge ?
Option 0: It takes less mental effort .
Option 1: It takes much longer .
Option 2: It is much faster .
Option 3: It takes less physical effort .
Answer: 3