Final answer:
The appropriate object pronouns in the given sentence are 'le' and 'los'.
Step-by-step explanation:
The appropriate object pronouns for the given sentence are le and los.
The sentence 'Eduardo dio una invitación a la fiesta a Mariana y Luis anoche' translates to 'Eduardo gave an invitation to the party to Mariana and Luis last night.'
So, the correct sentence with object pronouns would be 'Eduardo les dio a Mariana y Luis una invitación a la fiesta anoche.'
Learn more about Object Pronouns in Spanish