is this a question from ur school?. if so this is something you should answer or ur own......
Answer:
This led to
Explanation:
blank, This led to another blank
cause effect
It's D. The narrative will change depending on the narrator's tone and point of view.
yes i agree a should be it,
It is cheaper to use fossil fuels then to invest in renewable energy technology.
Research link(https://www.theguardian.com/environment/2013/apr/17/why-cant-we-give-up-fossil-fuels)
-Agarvated