I asked my friend Lena, a master quilter, if she learned quilting from a book, from a class, or if she had a mentor.
a.
I asked my friend Lena, a master quilter, if she learned quilting from a book, from a class, or from a mentor.
b.
I asked my friend Lena, a master quilter, if she learned quilting from a book, from a class, or if there was a mentor.
c.
no change
