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.
From there, the Germans dug trenches. When the British and French forces tried to pass these trenches, they were killed by machine guns and chemicals (chlorine gas). The Allied forces could not pass through those trenches effectively, and therefore, dug their own trenches. **************************************... Because of this, the warfare became slow because neither forces were capable of penetrating the opposing force's trenches. Thus, TRENCH WARFARE.