Which of the Following Sequences Reflects the Order in Which $\rightarrow$

Which of the following sequences reflects the order in which the behaviorists discussed in your text made their most important contributions to the field, from the earliest to the most recent?

A) Watson $\rightarrow$ Bandura $\rightarrow$ Pavlov $\rightarrow$ Skinner
B) Pavlov $\rightarrow$ Watson $\rightarrow$ Skinner $\rightarrow$ Bandura
C) Watson $\rightarrow$ Pavlov $\rightarrow$ Bandura $\rightarrow$ Skinner
D) Pavlov $\rightarrow$ Watson $\rightarrow$ Bandura $\rightarrow$ Skinner