The answer is C. a la puerta
Necesito más información para contestar a tu pregunta
A. eres
Explanation: Eres mean “you are” B. means “We are” which makes no sense. C. es means “is” you is does not sound right in english either so it’s not C. and D. means “are” but it is used when it’s plural. :)
¿Qué quieres decir?
Ddmdmdmdmdmdmdmdmdmfjfjfjeek