An increase in productivity should ?

An increase in productivity should ?

A. Lead to a contraction of supply
B. Lead to an expansion of supply
C. Lead to a shift in supply outwards (i.e more supplied at each and every price)
D. Lead to a higher equilibrium and lower equilibrium quantity

For a normal good ?

For a normal good ?

A. The price elasticity of demand is negative the income elasticity of demand is negative
B. The price elasticity of demand is positive the income elasticity of demand is negative
C. The price elasticity of demand is negative the income elasticity of demand is positive
D. The price elasticity of demand is positive; the income elasticity of demand is positive