Software-related problem

Which of the following is ALMOST CERTAINLY a software-related problem?
A. No video on display
B. Single beep at startup
C. No Internet connectivity
D. iPhoto quits when launched
[toggle title_open=”Close Me” title_closed=”Answer” hide=”yes” border=”yes” style=”default” excerpt_length=”0″ read_more_text=”Read More” read_less_text=”Read Less” include_excerpt_html=”no”]D[/toggle]