What was the geographic context for imperialism in the 19th and 20th centuries?

There are few reasons that Imperialism grew so rapidly at the end of the 19th century. One of the reasons was industrialisation. With the industrialisation revolution beginning at the start of the 19th century the big powers in Europe were getting superior than other small countries like in Asia or Africa.

c. troops marched forward in close formation against newer, more accurate weapons

the correct answer is option d

the economy will face inflation