There was a time when a C meant average. The average GPA at four-year colleges and universities has risen from 2.52 in the 1950s to 3.11 in 2006. And according to Stuart Rojstaczer, a former Duke University professor and founder of GradeInflation.com, GPAs only keep rising. At some colleges, Rojstaczer says, over 50% of the grades given are A's.
Trench warfare was caused by an advance in defensive weaponry. The machine gun was too heavy to be used as a mobile weapon, and therefore was placed into a fixed position. Barbed and concertina wire was also heavily used.
Trench foot was a fungal infection that was caused when a soldier had prolonged exposure to damp, cold conditions allied to poor environmental hygiene. Most common symptoms were itching, swelling, feeling of heaviness, and blisters. Out of an army of 1 million, 20 thousand soldiers would contract Trench Foot (chart). Most soldiers with Trench Foot became amputees.