According to the text, which statement best describes an advantage to retailers associated with developing their own brands?

Question $12$ options:

a$)$

Dealers often buy in large quantities and thus always have a ready supply.

b$)$

Private brands, particularly those owned by discounters, are perceived to be of a higher quality.

c$)$

Higher margins are available on private brands.

d$)$

Dealers must market the brand, thus improving its skills base.