Which of the following was a characteristic of the German Empire apex?

The apex of the German Empire, particularly during the late 19th and early 20th centuries, was characterized by rapid industrialization, military expansion, and a strong centralized government. This period saw Germany emerge as a leading European power, marked by significant economic growth and advancements in technology. Additionally, nationalism played a crucial role, fostering a sense of unity and pride among the German states, while also contributing to tensions with neighboring countries.