B becuase there should be an extra sentence in the beginning.
Source 1 would be the most reliable. This being due to the fact that it contains information about the most recent advances, which you need for your paper.
A is the answer because it has proper sentence structure
Answer:
A. She should take her books and go to a local library to study.
Explanation:
You should suggest a friend go to the local library. She could not contrate in her house, even though she could use earphones, the houseguests can be deconcentration and might come to her room.
The best solution for her is to find a quiet place for studying where no one could interpret her and where can she study and read in quiet.
The local library has room for studying and she could be studying with other students and be concentrate on the material she needs to learn.
