Who did you choose as guardians?
There are lots of factors involved, in no particular order:
1) Age of guardians
2) Location of guardians
3) Values / Family lifestyle
4) Capability of parenting
5) Family size of guardians
6) Your kid(s) knowing the guardians well enough
We can't figure out who would be the best guardians for LO! Each of our 4 options have significant drawbacks