Of the US schools Auburn, Cornell, and VA-MD explicitly state in my OLD VMSAR that they will take C- in their pre-reqs.
UTK and Western will only take a C or better.
The others I didn't see anything specific when I was flipping through, but most have specific minimum GPAs.
If you're borderline in your stats, it would behoove you to get a VMSAR for this year so you don't waste your money applying to the wrong schools.
Just a thought....