What can we learn from the NORJAK event?

Tell me what you guys think of this made it for class need opinions

Which best corrects the run-on sentence? the belt of orion has three bright stars in a row it is visible in the northern hemisphere. a. the belt of orion has three bright stars in a row, and it is visible in the northern hemisphere. b. the belt of orion has three bright stars in a row. in the northern hemisphere, it is visible. c. the belt of orion is visible in the northern hemisphere; has three bright stars in a row. d. the belt of orion has three bright stars in a row; visible in the northern hemisphere.

Ineed this quick. which of these number is main idea?