Answer:
C). It is always important to stress reader benefits in the body of your cover letter; describe your strong points in relation to the needs of the employer.
Step-by-step explanation:
Punctuation is crucial to enhance the readability and clarify the meaning of the text to the readers. It primarily functions to display the structural formation of a sentence which clarifies the meaning.
In the given question, the second sentence is most appropriately punctuated as it correctly employs semicolon(;) to link the two independent clauses('It...letter' and 'describe your...employer') which are firmly associated with each other in idea. Thus, option C is the correct answer.