A nurse is discussing issues regarding controlled substances and reporting with a newly licensed nurse in an inpatient facility. Which of the following statements made by the newly licensed nurse indicates an understanding of the teaching?

"Controlled substances are kept in the bottom drawer of the medication cart."

"I should verify the number of controlled substances at the end of the shift. The provider is responsible for inventory of controlled substances."

"If a controlled substance requires a waste, a second nurse must witness the waste."

"Computer controlled substance inventory is reported to the Drug Enforcement Administration every 10 years."