What is the amount of sediment a river carries

Iknow #2 is d. i just need to know why

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Describe the forces both attractive and repulsive that occur as two atoms move closer together.