Most humans by shoes in pairs, this is because they happen to have what?
Options:
- two ears
- lay eggs
- one head
- a bad day
- two feet
Let's think now! Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Humans have two feet so they have to buy shoes in pairs.
So, the final answer is two feet.