Which of the following statements best describes why radioactive decay occurs?
a) the electric force causes electrons to be released.
b)the electric force and nuclear forces are in opposition to each other.
c)nuclear forces disintegrate protons.

Option C is correct

Explanation:

nucleus forces disintegrate protons from the nucleus with the passage of time .

10 years is the answer

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%).