Answer:
Are Nag and Nagaina unfairly cast as villains
1. D is the answer
2.A is the answer
3.C is the answer
4.C is the answer
The synonym that describe the greatest degree of regret would be : D. Repentant : Feeling remorse to a degree marked by an extreme change
For example, people who felt repentant because he tend to scam other people make a drastic change and decided to became a monk in Asian continent
hope this helps
A. None of the others make sense, so it should be that one.
I believe the answer is A). Smart phone