The price elasticity of demand is influenced by several factors:
(A) Nature of goods: Necessities (like salt) tend to have inelastic demand, while luxuries (like sports cars) have elastic demand.
(B) Price level: Goods that take up a very small portion of a consumer's budget (low price level) tend to have inelastic demand (e.g., matches).
(C) Income level: The elasticity of demand for a good can differ for high-income and low-income consumers.
Other factors include the availability of substitutes, number of uses, and time period.
All the given options are valid factors affecting the elasticity of demand.