Erin's water bottle holds holds 600 milliliters of water. Ryan's water bottle holds 1 liter of water. Whose water bottle holds more water? How much more water?

Ryan’s water bottle holds more by 400 milileters

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.