I would say A, that seem like the answer
Answer:
In both first and second language acquisition, universal grammar may influence learning. ...
In both first and second language acquisition, there are predictable stages, and particular structures are acquired in a set order. ...
In both first and second language acquisition, making errors is a part of learning.
It's A. Hope this helped.
Several ways you can determine the validity is
1.) The author and his credentials.
2.) Sources that back up the article/publication.
3.) Whether the article features bias or none, when appropriate.