Assume an array called num is declared to store four elements. Which of the following statements correctly assigns the value 100 to each of the elements?

a. for(x = 0; x < 3; ++x) num [x] = 100;

b. for(x = 0; x < 4; ++x) num [x] = 100;

c. for(x = 1; x < 4; ++x) num [x] = 100;

d. for(x = 1; x < 5; ++x) num [x] = 100;

e. none of the above