Question

the passage below describes an experiment.
betty soaked 40 two - inch by two - inch squares of white fabric in grape juice for 10 minutes. she washed 20 squares in a washing machine with half a cup of laundry detergent. she washed the other 20 squares in the same washing machine with half a cup of laundry detergent and a quarter cup of bleach. she left each square out to dry, then compared how much of the grape juice stain had been removed from each square.
identify the question that the experiment can best answer.
are grape juice stains removed from fabric more effectively when washed with half a cup of laundry detergent or one cup of laundry detergent?
is fabric more durable after being washed with laundry detergent mixed with bleach or when washed with laundry detergent alone?
are grape juice stains removed from fabric more effectively when washed with laundry detergent mixed with bleach or with laundry detergent alone?

Explanation:

The experiment has two groups. One group uses half - a - cup of laundry detergent only, and the other uses half - a - cup of laundry detergent plus a quarter - cup of bleach. The variable being tested is the addition of bleach to the laundry detergent. The outcome being measured is the removal of grape - juice stains from fabric.

Answer:

Are grape juice stains removed from fabric more effectively when washed with laundry detergent mixed with bleach or with laundry detergent alone?