[Video] Q22: The only stumbling blocks to additional innovations may be national energy policies that make potential investors hesitate or caes is a promising solution to one of alternative energy's biggest challenges. or it is dismaying that caes technology is not yet as efficient as it could be. or residential applications of caes technology- in addition to large operations- are likely to become feasible soon.

Explanation for Question 22 From the Writing Section on the 2018 April Sat

Hey guys. So question 22 says the writer wants a conclusion that restates the 2 main idea of the passage, which choice most effectively accomplishes this goal. 3 So if you want to think back to the main idea of the passage, 4 what would you do? You need to obviously think about the passenger as a 5 whole and good points to look back to, 6 or the starts of the passages? So the passage at the beginning says renewable 7 energy sources pose a challenge for businesses, 8 utilities that use them. So renewable energy can be a challenge, 9 the need to store surplus energy to use later as an issue. 10 And then it talks about these things, but then says a method of storage 11 called compressed air energy storage. CAS is one method that may be one of 12 the best solutions. So here's this problem. 13 And here's a potential solution, which is CAS. 14 So when it says, given the growing shift to renewable energy sources, 15 it seems like the idea that CAS has a primary promising solution to one 16 of alternative energies, biggest challenges is the main idea. 17 There's a challenge about storing energy. How do we store energy and CAEs, 18 which it goes on to describe in length in this passage is the possible 19 solution. When it comes to this alternative energy challenge, 20 option a says, the only stumbling blocks, the additional innovations may be national energy 21 policies and make potential investors has hesitate nothing. 22 And as pastors talked about like potential investors hesitatin...