what is the best data structure to solve the following problem? a list needs to be built dynamically. data must be easy to find, preferably in o(1). the user does not care about any order statistics such as finding max or min or median.

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.