Symbols are often timeless and universal nature.
College is a lot of money, which most people don't have that much money. If you get a scholarship then it's like all your problems go away. For the lower-class people, they need to work harder than the higher-class because they don't have the same privileged as the others. When you don't have the same privilege as others you need to work harder than the others.
Idk but yeah that’s all I know lol
Is - two billion dollars is a unit, one unit so it is singular and you use the singular verb
think - scientists is a plural, therefore, you must use the plural verb form of think
