What are the integer solutions of the inequality |x| < 4?
a. –3, –2, –1, 0, 1, 2, and 3
b. 0, 1, 2, 3, and 4
c. –4, –3, –2, –1, 0, 1, 2, 3, and 4
d. 0, 1, 2, and 3