3 Ways to Report NSF REU Stipend?

Unfortunately,  have spent hours researching and trying to figure out how to properly report a $6,000 NSF REU stipend that was NOT included on a W-2, 1098-T, or on a 1099-Misc.  Many have done this differently.  I have found 3 identified ways to report this:

 

1.  Include as "other scholarship, not shown in 1098-T".

2.  Include as "other income", Schedule 1, item 8z.

3. Include as "other earned income", 1040, item 1h.

 

Any suggestions?

Thanks, Randy