Greyfields are in decaying suburbs.
a.
empty homes and foreclosed subdivisions
b.
sites for future development
c.
vacant commercial spaces and empty shopping malls
d.
undeveloped land and nature preserves

I think the correct answer from the choices listed above is option C. Greyfields are vacant commercial spaces and empty shopping malls in decaying suburbs. Hope this answers the question. Have a nice day. Feel free to ask more questions.

Answersource rock;