The answer is B. estudiante.
The article preceding it, 'las', is the plural feminine article. 'estudiante' in the sentence is singular only, but it is gender neutral. 'son' is the third person plural conjugation of the verb 'ser'. 'inteligentes' is an adjective that would refer to plural subjects. To fix the sentence, change 'estudiante' to 'estudiantes'.
Answer:
Caballos y caracoles no deben ser comidos por personas que se consideran elegantes, porque manchan y salpican mucho.
It means that elegant men (in this case 'señores') don't eat horses nor snails because its a mess.
answer:¿Dudáis que el pollo asado de ese restaurante sea de buena calidad?
Answer:
Look out cause her i come. and im marvhing on to the beat i drum.
