Choosing SAT subject test

It’s too late for me to change it now, but I’m still curious. Why did you choose the sat subject tests you did
1.) to make up for a discrepancy on your record
2.) because you really enjoyed the classes
3.) because they’re connected to your major
4.) because you wanted to make sure you could apply everywhere you wanted to

For me, it’s kind of 1 and 4. But, I get the sense that 2 and 3 are more common.