Which of these elements are most important for Sneha to include in the given letter? 

You are Sneha, a resident of Hubli, Karnataka. You have to write a letter to the editor of a national daily, drawing attention to families who are paying their domestic workers below Karnataka's minimum wage of Rs. 195 for eight hours of work per day.

Which of these elements are most important for Sneha to include in the given letter? 

(I) a formal tone 

(II) creative graphics and images 

(III) the sender's and receiver's address 

(IV) a narrative of one's own experience 

A. Only (I) 

B. Only (IV) 

C. Only (I) and (III) 

D. Only (I), (III) and (IV)