Answer:
Do you know the man that sent your sister the expensive birthday card?
Is that the old man who they saw at the supermarket the other day?
The hawker is actually a very healthy man who you bought the fried noodles from.
All those girls' voices are good who will be given a chance to take part in the singing contest.
I'm going to meet the boy that I met at your birthday party.
The principal congratulated the boy that scored straight A's.
Is that the detective which helped to catch the criminals?
Explanation:
 
        
             
        
        
        
The answer is D. When you are saying what a broader subject is, you surround it with commas. For example, when I say "My aunt, Sally, is old.". My broader subject is aunt. I show more detail by telling you her name, Sally. I hope this helps!
        
                    
             
        
        
        
Answer:
8 August 2020
dear xyz,
 hope you are doing good and healthy, and studying, so yesterday I got your letter and you asked me how am preparing for my forthcoming exam as you told that you exams are near so you need some tips
am preparing my exam in three ways first I have made a time table for my subjects by which I can revise and cover every chapters of every subject as per my time table, second avoid the things by which you get distraction while you study keep your mind fresh and study in a silent place and take a test of yourself after revising a chapter to know your progress , third don't get stress and take breaks and prepare your things before the day of examination and ask your doubts from the teachers which are not clear
so prepare well for the exam and am also busy nowadays for the preparation stay healthy and don't feel scare while giving exam 
yours Loving friend
sharoneba
hope it's helpful for you 
(sorry for grammatical error):)