In which city was Einstein born?

Correct answer: Ulm

The governing fact in the biographical lesson is that Albert Einstein was born in Ulm, in the German Empire, on 14 March 1879. Therefore option A, Ulm, is correct. The other places are connected with different stages of his life or career: Bern was where he later worked at the patent office and developed important ideas, Zurich was associated with his education, and Princeton became his later place of work in the United States. These associations can make the distractors plausible, but they do not identify his birthplace. A useful memory link is “1879–Ulm,” which joins the birth year and city.