Answer:
what's the debut about if I can let me help you
The correct answer would be C, because you need to separate appositive/relative sentence with commas.
It's b. Here are more characters to make this answer look smarter ;)
Heres the sample one EDGEN gave:
I recently learned about the story of Malala, a girl from Pakistan who stood up to the Taliban. She was attacked because she believed girls should have the chance to learn and go to school. A petition started to support Malala's cause calls for all the world's children to be enrolled in school by 2015. I support this petition and think you should, too.
