Contrast contiguity and contingency, and describe the importance of these for conditioning to occur.

a) Contiguity involves time proximity; contingency involves predictive relationship; both are crucial for conditioning

b) Contiguity and contingency are synonymous in conditioning

c) Contiguity focuses on predictability; contingency emphasizes time proximity; both are irrelevant for conditioning

d) Contiguity and contingency are unrelated in conditioning