Which of the following is an example of utilitarian influence?

a$.$ Anna's decision to purchase Mai Couture brand for her prom dress is influenced by the preferences of her family.

b$.$ Anna seeks brand$-$related knowledge and experience from friends, neighbors, colleagues, and relatives who have reliable information about the brand.

c$.$ Anna feels that the purchase of a particular brand will enhance the image others have of her.

d$.$ Anna seeks information about various brands from a professional.