Macbeth seems alarmed by the witches’ greeting. Why might he be startled by these titles?

i would say it means that you're never alone, that there will always be people supporting me and showing me that they care for me and love me

explanation:

the correct answer is c. he speculates on what might happen at given points in the future in a world without people. alan h. weisman is an american author, professor, and journalist. authors organize their information with a purpose. they present their ideas in an organized way. this is called text structure. weisman uses text structure so as to improve overall comprehension and to prove his points.