This question is worded awkwardly
        
             
        
        
        
Answer:
Compound 
Explanation:
A simple sentence contains one independent clause. A compound sentence contains more than one! Put another way: a simple sentence contains a subject and a predicate, but a compound sentence contains more than one subject and more than one predicate.
 
        
             
        
        
        
Answer:
C "Hence, more schools should follow the trend of starting later in the morning if they want to see improved test scores, greater attendance numbers, and, most importantly, healthier, happier teens."
Explanation:
I doubted it at first because it sounds too repetitive with sentence 13, but it makes more sense than the other options and relates to the argument and establishes a unified end as it summaries that more schools should have a later start time to help students succeed academically and improve their general wellbeing.
 
        
             
        
        
        
The answer is D. This is because it mentions that in EARLY AMERICA they were already using presidential campaigns and it’s still happening today.