Place the five business functions in the order they appear along the value chain:

$A=$ Customer service

$B=$ Design

$C=$ Distribution

$D=$ Production

$E=$ Research and Development

$F=$ Marketing

A$.E,B,D,F,C,A$

B$.A,E,B,D,C,F$

C$.A,C,D,B,F,E$

D$.E,B,A,D,F,C$

E$.B,E,D,F,C,A$