When classifying retailers $($as in lecture$)$ large, limited$-$service discount$-$oriented stores can be broken into two major groups: $\_\_\_\_\_\_\_\_\_\_$ and $\_\_\_\_\_\_\_\_\_\_.$

a$.$

low$/$no$-$service; full$-$service

b$.$

general mass merchandiser; specialty mass merchandiser

c$.$

chains; franchises

d$.$

dominant; subordinate

e$.$

in$-$store; non$-$store