The correct answer is A. Regional dialect
Step-by-step explanation:
In linguistics, a dialect refers to a variation of a language that is part of a group or culture and is closely related from the language it derives, although there are slight differences on words, sounds, syntax, etc. Additionally to this, dialects can be of different types, if they emerge in social classes or social dialects they are called sociolects; if they are part of ethnic groups then they are ethnolects and if they emerge in a specific region then they are considered as regiolects or regional dialects. In the case presented, the dialect described is a variation from the Spanish language which means it shares most of the features of Spanish but has slight difference, also this dialect originated in a specific region which is a small village and therefore the type of dialect this case describes is a regional dialect.