Helpp me please be 100% sure.

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.

Acredible source is one that is (4 points) select one: a. with bias b. not useful c. persuasive d. trustworthy

What was noras point of view on what her parents were doing in keeping freedom in the family?