Answer:
The answer is a) Cenarán
Step-by-step explanation:
Option b) ceno is incorrect because this is the conjugation of the verb cenar (to have dinner) in present tense in first person singular Yo (I); Yo ceno. Since the subjects of the sentence are Carlota and Alberto, the correct conjugation of the verb is in third person plural Ellos (They)
Option c) cenas is incorrect because this is the conjugation of the verb cenar (to have dinner) in present tense in second person singular Tú (You); Tú cenas. Since the subjects of the sentence are Carlota and Alberto, the correct conjugation of the verb is in third person plural Ellos (They).
Option a) cenarán is correct. Cenarán is the conjugation of the verb cenar (to have dinner) in simple future tense in third person plural Ellos (they); ellos cenarán, which is the appropriate form to use in this sentence. Also, the simple future tense is used to denote plans, in this case, plans for dinner.
The complete sentence would be
Carlota y Alberto cenarán con nosotros (Carlota and Alberto will have dinner with us)