Answer:
i think D
hope this helps
let me know if i'm wrong i will change the answer
Explanation:
The efficiency can never be 100 because some of the work will be transferred into thermal energy. In turn, causing the percentage to decrease. This is basically the second law of thermodynamics.
If the earth just doubles its size in an instant, the oxygen present in the atmosphere could be much larger. Due to these, we could theorize that insects could grow much larger because the size of their body is heavily dependent on the maximum amount of oxygen present in the atmosphere. Air pressure also increases thus those aerial enthusiasts would enjoy their professions.