Which sentence contains a noun which is in the incorrect form?
"there are people who laugh at the horse that would not dare to laugh at
the master cried the young would-be musketeer.
"i do not often laugh, sir, replied the stranger, as you may see by the
expression of my face, but nevertheless i retain the privilege of laughing
when i ."
"and i cried d'artagnan, will allow no man to laugh when it
me! "
and the stranger, muttering to himselves, directed his steps toward the
kitchen

Which is not among the style choices a writer would use, if he or she is trying to establish a formal writing style/

When aquinas realized that he could not find all the answers, he turned to

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.