Professor hansen expects that students will sit quietly and take notes during his large lecture course. thus, a student who talks in class and never opens a notebook violates professor hansen's about students.

Thus, a student who talks in class and never opens a notebook violates Professor Hansen's "schema" about students.

A schema is a psychological concept that educates a man about what's in store from an assortment of encounters and circumstances. Schemas are produced in light of data given by life encounters and are then put away in memory. Our brains make and utilize schemas as an easy route to make future experiences with comparable circumstances less demanding to explore.  

the answer is d.index

the vibration from the sound waves messed with the glass and it shattered.

hope this .