Which of the following factors leads to a greater inelasticity ofdemandof the product, ceteris paribus?

Select one:

a.the good has a larger number of available substitutes

b.there has been a longer time elapsed since the change in price of the good

c.the good uses very unique factors of production to produce

d.the good makes up a rather large proportion of the consumer's budget

e.none of the answers listed here is correct