Why do long$-$run elasticities of demand differ from short$-$run elasticities? Long$-$run elasticities of demand differ from short$-$run elasticities because... $[$select all that apply$]$

A$)$ durable goods last a relatively long time.

B$)$ it takes time for consumers to respond to price changes.

C$)$ firms may be constrained in the short run by production capacity.