The answer is letter B, río.
Castilian dialect, Spanish Castellano, a dialect of the Spanish language (q.v.), the basis of modern standard Spanish. Originally the local dialect of Cantabria in north central Spain, Castilian spread to Castile. After the merger of the kingdoms of Castile, Leon, and Aragon in the late 15th century, it became the standard language of all Spain and in the following centuries the language also of Spanish America.
#1 yo tengo 18 año el viernes
b. La naranja (es no tipico producto de cultivo de los Incas)
Hacemos, bailaré, those are your future verbs