a student is participating in the school science fair. she wants to investigate household cleaners. which…

a student is participating in the school science fair. she wants to investigate household cleaners. which question can she best answer through scientific investigation? which household cleaner is most effective at removing stains? which household cleaner smells the best? how often should a person use household cleaners? where should a person buy household cleaners?
Answer
Brief Explanations:
La efectividad en la eliminación de manchas es un aspecto cuantificable y observable que se puede estudiar científicamente. El olor es subjetivo, la frecuencia de uso depende de muchos factores personales y la ubicación de compra no es un tema científico en este contexto.
Answer:
Which household cleaner is most effective at removing stains?