Which item could serve as a primary source for a historian studying the end of apartheid in south africa

If you lived in greece in about 300b.c. you had a good chance of witnessing which of the following? select all that apply

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

Which one of the following statements best characterizes change to agriculture in the united states since 1900