A woman was considered to be the property of her husband????
Answer: The answer is A. Martia's attitude swings between feeling loved by her family to feeling unappreciated.
Here, you would need to add the preposition "in."
The sentence should read: My elder sister is really interested in the problems of the environment.
Other prepositions would not make sense and could confuse the reader as to the intended meaning.
A dash should be inserted after the word nanoscale