Read the following context and choose the best option to answer the question.
Context: Sorry I have n't written often this week , I have tried to keep up with as many blogs as possible but have been rather busy so I have n't had time to post myself . As many know Renny was away most of the week , and when he is away I try to fill my evenings with social activities so I do n't get too lonely . Monday was parents night at my son 's High School and my first opportunity to see what he does all day long when he is at school .
Question: What may be the reason why Renny is away ?
Options: 
A. He 's in college .
B. He 's in the military .
C. None of the above choices .
D. He travels for work .


D