Final answer:
The people represented by the Third Estate in pre-revolutionary France were primarily commoners, which included peasants, the urban poor, and the bourgeoisie, such as merchants and professionals.
Step-by-step explanation:
All people represented by the Third Estate in pre-revolutionary France were primarily of the social status of commoners. This encompassed a broad range of individuals, including peasants, the urban poor, the wealthy bourgeoisie or urban middle class, and professionals like merchants and artisans. While there were merchants in the Third Estate, not all commoners were merchants, and as such, option 4) Merchants does not accurately describe the entire Third Estate. The best answer is 3) Commoners, which includes all the non-noble, non-clerical members of the French population during this period.