Write the next sentence in the following story.

How to sign a letter
Thank your recipient for their time.
This can be included in the end paragraph, or as a formal closing. Write something like :
Thank you for your time and attention on this matter.

a). I am looking forward to hearing about my latest product and will appreciate it when i am back in business. Also, i am looking forward to answering your questions.
b). Thank you for your patience in letting me know who i can contact if i don't hear back soon. It would mean a lot to me if this happens.
c). Things like this should be included for the rest of the first paragraph. For example, " dear joe, thank you for the opportunity to network with other professionals, interview for grants, and even participate in annual charity drives and events.
d). I appreciate your consideration, thank you for your time. A simple " thank you, " at the end of your paragraph.. The answer should be
d).