Select all that apply.

how is the genitive (possessive) case commonly shown in modern english nouns?

1.adding s' to the singular
2.adding s' to the plural
3.adding 's to the singular
4.adding s to the plural

Which best compares the authors’ purposes in silent spring and “save the redwoods”? both authors want readers to protect human rights. both authors want readers to focus on saving trees. both authors intend to entertain readers with their essays. both authors intend to convince readers of their viewpoint.