Final answer:
'Mis suegros son chistosos.' is the correct option
Step-by-step explanation:
Mis suegros son chistosos. is the correct option. It is the irregular verb 'ser' conjugated in the imperfect tense. In Spanish, the imperfect tense is used to describe past actions that were ongoing or repeated. Regular verbs in the imperfect tense follow a consistent pattern, while irregular verbs have unique conjugations.
For example, in the present tense, 'ser' (to be) is conjugated as 'soy' (I am), 'eres' (you are), 'es' (he/she/it is), etc. However, in the imperfect tense, 'ser' is conjugated as 'era' (I was), 'eras' (you were), 'era' (he/she/it was), etc.
Learn more about Spanish irregular verbs in the imperfect tense