Which of the Following Best Illustrates the Response Chain for Social

Which of the following best illustrates the response chain for social referencing in infants?

A) S^D_{ambiguous stimulus} → R_reach → S^D_{look at parent} → Consequence
B) S^D_{ambiguous stimulus} → R_{look at parent} → S^D_{parent's expression} → R_reach → Consequence
C) S^D_{ambiguous stimulus} → R_reach → S^D_{parent's expression} → Consequence
D) S^D_{parent's expression} → R_{look at parent} → S^D_{ambiguous stimulus} → R_reach → Consequence