Even though you didn't give us the fragment with the comma slice, it isn't really necessary here as we can answer just based on these 4 options here. All options apart from the second one are correct - only the second option doesn't fix the mistake of the comma splice, whereas the other options do but connecting the sentences properly.
Answer:
1. What country was the leading European explorer during the 15th century?
2. Where was the capture of Cueta that provided Portugal with much needed gold?
3. Which two countries were funding over the lands Columbus claimed for Spain?
4. What was the ancient name of China that Marco Polo wrote about called?
5. Columbus first voyage saw him on a mission to find a seat route to where?
6. Who funded military campaigns to defeat Islam?
Explanation:
Hope this helps.
Imagery for apex
Read they switch the answer up now
The answer would be "d" because Science fiction is made up of fictional story's about science and technology.