题目选项分析

One pervasive theory explains the introduction of breakfast cereals in the early 1900s as a result of the growing number of automobiles, which led to a decline in horse ownership and a subsequent grain glut; persuading people to eat what had previously been horse feed restored market equilibrium.

One pervasive theory explains the introduction of breakfast cereals in the early 1900s as a result of the growing number of automobiles, which led to a decline in horse ownership and a subsequent grain glut; the persuasion of people to eat what had previously been horse feed restored market equilibrium.