Final answer:
The correct form is encantan.
Step-by-step explanation:
The correct form of the verb 'encantar' in the given sentence is D. encantan.
In Spanish, the verb 'encantar' is used to express strong likes or preferences. When referring to plural nouns, like 'las papas' (potatoes), the verb should be conjugated in the third person plural form, which is 'encantan'.
For example, 'Me encantan las papas fritas' means 'I love french fries'.
Learn more about Conjugation of the verb encantar