Which line from "Summers in the Oak" best supports the view that things never stay the same?

A
That had been eleven years ago, and, now in high school and far too mature and busy to climb trees or build tree houses, the three were still steadfast friends. <- Can't be this one, it mentions they're STILL friends.

B
The line of lunchtime regulars outside the front door of the burger joint dwindled and disappeared as people scattered frantically to their cars to avoid the deluge. <- possible, but just because they're avoiding a flood doesn't really mean things are changing, does it?

C
Thaddeus caught sight of the old companion that had once been the site of so many adventures for the three friends, and yelled out, "Whoa! Look at that! It's totally wasted!" <- also possible, but I'm unsure.

D
"Dad was right, I guess, warning us about being struck by lightning," Thaddeus commented, then laughed a little nervously. <- doesn't really have anything to do with the idea.