In social studies, the term "head and shoulder" can be associated with a significant economic concept. Which of the following best describes the "head and shoulder" pattern in the context of market analysis?
A) A pattern that indicates a potential reversal in the stock market trend.
B) A term used to describe the hierarchical structure of a traditional family unit.
C) A pattern of migration that illustrates the movement of populations across borders.
D) A model for analyzing the distribution of resources in an agrarian society.