6) Of this examples, the sentence containing an idiom is B.
The phrase "stand a chance" does not have any meaning that can be deduced from the individual words. It was through usage that it acquired the meaning of "having the possibility of doing something".
7) The diction from the excerpt of "And of Clay Are We Created?" is C: vivid and figurative.
The words in this sentence creates a very vivid image of war, the soldiers' dispair and the dreadful image of bodies rotting in the mud.
At the same time, the tone is figurative because the author uses the word "infinite" to express that there was a great amount of dead animals; and uses the expression "viscous soup" to refer to the mixture of rotting bodies, dead animals and mud.
