Which of the follwing are true? [mark all correct answers]
a.
A purely instrumental piece cannot be "strophic" since "strophes" are a poetical device that isn't present when there's no text for a piece of music.

b.
"La donna e' mobile" uses a strophic form

c.
A 12-bars blues can be strophic if it has lyrics.

d.
The song "If I Can Help Somebody", as orginally composed, is strophic.

e.
Mahalia Jackson's performance of "If I Can Help Somebody" is actually not strophic.

f.
"Someone to Watch Over Me" actually has a pretty complex form for a popular song. The lyrics are organized in strophes, but they are accompanied by one of three different melody/chord progression combinations.

g.
"Lovesick Blues" does not use 12-bar blues form, 32-bar pop song form, or even a clear-cut verse-chorus form. This is another pretty complex form to find in a popular song.