Question

If Jack bought $12$ DVDs last year when his income was $$40,000$ and he buys $14$ DVDs this year when his income is $$43,000,$ then his income elasticity of demand is Jack

$q,$ a$.-0\mathrm{.}47$ ; inferior $$ which means that DVDs are a$($n$)q,$

b$.+2\mathrm{.}13$ ; normal

c$.+0\mathrm{.}41$ ; normal

d$.+0\mathrm{.}59$ ; inferior