D.
At first glance, they look like quadruplets!
Exactly the same. Copy-pasted for a perfect row.
They are standing in a tidy grid, waiting for your close inspection.
This whole setup is designed to be a little visual trick.
Our minds often gloss over the fine details when things seem identical.
The puzzle here is a classic “odd one out.”
One of these little shaker friends is a tiny bit different from the others.
Just one. And the difference is “slightly” different.
Which means it’s not an obvious change like
