Which of the following was a factor in the collapse of the Mayan culture?

These two phrases are

a. exactly alike except for the words b. somewhat alike and have different words c. not at all alike

Which work develops and applies the concept of the Übermensch—a type of humans willing to reach "beyond good and evil" and create their own values?

a. Friedrich Nietzsche's Thus Spoke Zarathustra b. Flaubert's Madame Bovary c. Ibsen's A Doll's House d. Darwin's Origin of Species