Detailed Instructions: In this task, you are given a context paragraph of the tweet and question. Your task is to generate right answer of given question based on given context tweet paragraph.
Q: Context: NASA study: #MegaDroughts in US much more likely due to #ClimateChange @Scienceadvances NASA GISS (@NASAGISS) February 13, 2015 Question: what is making megadroughts more likely in the u.s?
A:
climate change