The lower yield point for an iron that has an average grain diameter of 1 × 10–2mm is 230 MPa (33,000 psi). At a grain diameter of 6 × 10–3mm, the yield point increases to 275 MPa (40,000 psi). At what grain diameter will the lower yield point be 310 MPa (45,000 psi)?

“foliation in geology refers to repetitive layering in metamorphic rocks. each layer can be as thin as a sheet of paper, or over a meter in thickness. the word comes from the latin folium, meaning "leaf", and refers to the sheet-like planar structure. “i found this on google i hope it you

Iagree c would be the answer

Ithink the answer would be a