Answer:
sorry I don't know anything about it
Explanation:
sorry I don't know anything about it
The answer is b.structure
The answer to your question would be D is incorrect hope this helps
Sentence 4 about year round schooling helps students learn and retain more seems not to be backed up with the evidence and that it may just be a supposition as a better approach might be to coampare the pros and cons of each and at least include the importance of students having a break to rest their brains as constant schooling could become oppressive.
The correct answer is tense (b) as there is a group of logical prepositions (prepositions that describe relationships between objects)