The plural would be the third one c los autobuses
Answer:
"diriamos" is in conditional
"iba" is in imperfect tense
Explanation:
The second answer. Because “sus” is the only one which has the “s” because it is plural. If it would be “nuestro” it should had an “s” like “nuestros hijos son altos” or “tus hijos son altos”
