The kinked demand curve model of oligopoly assumes the elasticity of demand ?

• A. in response to a price increase is less elastic than the elasticity of demand in response to a price decrease
• B. is perfectly elastic if price increases and perfectly inelastic if price decreases
• C. is constant regardless of whether price increase of decrease.
• D. in response to a price increases is more elastic than the elasticity of demand in response to a price decrease