In line 8, what point is the speaker making when he says i pull out all the stops and start my thorough speculation? a) he never stops looking for mysteries. b) he makes every effort to solve the case. c) he does not want to continue being a detective. d) he looks for reasons to discontinue his search

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were a 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.