A(n) to a cover letter leads to more interviews because you are contacting the employer.
a. passive
b. lengthy
c. active
d. creative

c. active

An active close to a cover letter leads to more interviews because you are contacting the employer. Moreover, a close and active engagement with the person or the reader leads to excitement for the employer to have curiosity over the person's capability and ability. 

Truehope this : )