conserve water resources control noninfectious diseases promote safe use of technology limit diseases spread by contact
I gave my students this multiple choice question: Many school districts are placing dispensers of hand sanitizer in classrooms and computer labs. Which of the following is the most likely purpose of this practice?

Only one answer is correct among these 4 choices:
- conserve water resources
- control noninfectious diseases
- promote safe use of technology
- limit diseases spread by contact

Could you tell me which one is correct?

limit diseases spread by contact