sure Pete. you use the D minor pentatonic. But you should know how to figure this out on your own…it’s easy;
look at your sheet music; you see the key signature is one flat. That means it’s either in the key of F major or D minor. These are the only 2 keys that have one flat.
Next we need to figure out if it’s in F major or D minor. Most times the answer is in the very last chord, or the 2 last cheords.
you’ll see that the last chord is a D minor which has an A7 before it. This is the most common progression in music; 5 to 1.
5 to 1 is the most common way to end a song. If this song was in F major it would end with a Bb7 to F so you know it’s in D minor…make sense?
as for the D minor pentatonic scale, once you learn it and know it, have a look at the somg’s melody…it made up mainly with the notes that make up that scale so you know you can’t go wrong.