Final answer:
The correct search order for a user-defined format with the given OPTIONS statement is orion.MyFmts, followed by work.formats, and then library.formats, which corresponds to option (d).
Step-by-step explanation:
The SAS OPTIONS statement specifies the order in which SAS searches for user-defined formats. When you specify fmtsearch=(orion.MyFmts), SAS will search for a user-defined format in the following order:
- orion.MyFmts
- work.formats
- library.formats
Hence, the correct answer is option (d): orion.MyFmts→work.formats→library.formats.