A post$-$purchase feature that could impact how environmentally$-$minded consumers feel about their use of Sephora products is:

a$.$ the store's return policy.

b$.$ the disposal options that Sephora promotes for empty plastic bottles, tubes, and other packaging.

c$.$ online Facebook community for loyal Sephora shoppers.

d$.$ the ability to contact Sephora's store beauty experts for additional consumption advice.