How is the possessive formed if the noun is plural and ends in -s? adding an apostrophe after the -s adding an aspostrophe and an -s after the -s adding an apostrophe and an -es after the -s adding nothing

Which punctuation mark would best fill in the blanks in the following sentence in the past year i visited denver, colorado portland oregon and seattle washington

Which revision of the sentence most effectively incorporates the literary term characterized?

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.