Hi! I’m taking U. S. History Honors in the 9th grade and we just reviewed this for the EOC! 
The Constitutional Convention was necessary because the Articles of Confederation could not be revised or amended due to the fact that Rhode Island refused to send delegates. A unanimous decision was needed to make any amends to the government under the Articles of Confederation so the delegates decided to form a new government. The men all agreed that the federal government was weak under the Articles of Confederation because the Americans who made it were afraid of a strong central government due to the unjust oppression that Britain put upon them as colonies. The delegates at the constitutional convention were both afraid that people were going to believe they were overthrowing their current government and determined to make changes to benefit their nation to preserve their fledgling country. They made sure to draft a constitution that had both a strong central government and a bill of rights (this was to appease anti-federalists who were afraid the new government would be too controlling or become corrupt) so the government could never take away what they termed “unalienable rights”. 

 
        
                    
             
        
        
        
Explanation:
A comma should follow a dependent clause when the dependent clause comes first in a sentence. A dependent clause is the clause which cannot stand alone in its meaning on the other hand independent clause refers to the phrase which can stand alone, though both have a subject and a verb.
 
        
             
        
        
        
Answer:
B. act or move at high speed.
Explanation:
The term hasten is derived from the word <em>haste, </em>which means to make something happen quickly. The word hasten is a verb, extended from the word haste and added with the pattern of verb '-en.'
Therefore, hasten means to <em>act or move at high speed </em>or to be quick on doing something, or move fast.
Thus option B is correct.