Because any element used in the cathode produced electrons, Thomson concluded that a.) atoms were indivisible.
b.) only metals contained electrons.
c.) atoms contain a nucleus.
d.) all atoms contained electrons.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.