Respuesta :
The answer is x. You can simply say cuando lavo el coche, no uso detergente. You could technically choose "te" but it doesn't make sense.
Answer:
Cuando lavo el coche, no uso detergente. The correct answer is "X", no pronoun is necessary.
Explanation:
Cuando lavo el coche, no uso detergente. In English: when I wash the car, I don't use detergent. The reflexive pronoun would be necessary if the sentence was about something related to someone. For example: "cuando me lavo la cabeza, no uso mucho shampoo". This means: when I wash my hair, I don't use much shampoo. Here we must use a pronoun, otherwise the sentence would lack sense. And it could be another pronoun, depending on whose hair is it. For example: "cuando te lavo la cabeza, no uso mucho shampoo". Meaning: when I wash your hair, I don't use much shampoo.