What were the characteristics of the writing system in sumer

Sumer's writing system consisted of Sumerian cuneiform script and Sumerian language. Sumerian cuneiform was the first writing system created, the type of writing system was semanto-phonetic. The symbols consist of phonograms, representing spoken syllables, determinatives, which indicate the category a word belonged to and logograms, which represent words.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.