The answer is c, mccarthyism. though it isnt a period of history, but rather a mindset.
Hey you didn’t upload the image, upload again and I’ll gladly help
D. By posting a well trained army throughout the empire
“era” refers to a period of time characterized by events in a chronological order.
“Period” can refer to a short interval of time or a very long interval of time.
South Asia, Australia, Europe, the Americas.