If the market for soft drinks is a cooperative oligopoly with a heterogeneous product, then which statement is likely correct?

Sellers would engage in both price competition and non-price competition. 

Sellers would engage in price competition but avoid more costly non-price competition. 

Sellers would avoid price competition but engage in less costly non-price competition. 

Sellers would not compete at all because competition would reduce their profits. 

Sellers would compete with their rivals only if government anti-trust laws forced them to do so.