Final answer:
The claim that only one to two hundred thousand immigrants from Ireland and Germany arrived in the U.S. between 1840 and 1860 is false; the actual numbers were much higher, with millions of Irish and German immigrants recorded.
Step-by-step explanation:
The statement that between one and two hundred thousand Irish and German immigrants arrived in the United States between 1840 and 1860 is False. The actual number is much higher. According to historical data, the German-born population in the United States grew from 584,000 to nearly 2.7 million and the Irish-born population from 961,000 to 1.6 million during that period. This surge in immigration can largely be attributed to a variety of factors, including economic opportunities, political unrest, and religious persecution in their home countries.