A is false because communism was conceptualized way before. B is false because communism was never dominant and socialism was tried many times. C is false because there aren't many modern democracies trying communism, but dictatorships.
The answer is D:
Socialism allows for some private ownership of property and businesses, but communism has the government hold all property
Many say that socialism is a step towards communism. It's a "middle ground" and many countries tried to implement this.
The primary distinction between modern communism and socialism is that socialism allows for some private ownership of property and businesses. The communism on the other hand has the government holds all properties.
It's debated; the credit is usually given to either Julia Ward Howe or Anna Jarvis. Howe was born first, so if you're looking for initial efforts, I would go with her.
The Tinker v. Des Moines Supreme Court case concerned two students who wore black armbands to school to protest the Vietnam War. ... The First Amendment protects the students' right to wear the armbands; they weren't disruptive, and the school allowed others to wear controversial symbols.