Landscaper Lottie Used Her Machinery,employee Labor,and Her Expertise to Landscape

Landscaper Lottie used her machinery,employee labor,and her expertise to landscape Opal's new guest home.Opal fails to pay for the landscaping because she has run out of money.Lottie files a lien against the real property.This lien is called

A) an artisan's lien; her landscape design is a work of art.
B) a landlord's lien; Opal is planning to rent the guest house to a tenant.
C) a mechanic's lien; it was created by improving real property.
D) a purchase money security interest.