“A walk worth taking” informal language?

A. Bryson calculates that he hiked “39.5 percent” of the trail, although he’d hoped to complete it.
B.Bryson, you may have guessed, was a neophyte woodsman.
C. “But hey, and excuse me,” he quips, “870 is still a lot of miles”
D. “Coldest ever for this date in Georgia”, a smiling hotel employee informed them.