Final answer:
Medical endorsement of bananas likely helped increase consumer demand and trust, boosting banana companies' sales and reinforcing their market dominance.
Step-by-step explanation:
When the medical community endorsed bananas, it likely had a significant impact on the perception of bananas among the American public. This endorsement would have given the fruit an aura of health and respectability, which could have increased consumer trust and interest, thus raising demand. As the public's faith in the health benefits of eating bananas grew, banana companies like the United Fruit Company (UFC) probably saw increased sales, solidifying their power in the market. Additionally, UFC's domination of the industry and its influence on Central American politics fostered conditions that allowed the company to flourish, further enhancing their ability to market the banana as a staple in the American diet.