Which reasons support the argument that cell phones should be turned off at school? check all that apply. a)parents should be able to text kids anytime in case of emergency. b)ringing and vibrating phones disrupt classroom instruction. c)many applications and internet sites display inappropriate material. d)students should be encouraged to use smart phones for research. e)text messages are personal and should be written in private. f)phones often contain calendars that are essential for time management.

B)Ringing and vibrating phones disrupt classroom instruction.

C)Many applications and Internet sites display inappropriate material.

E)Text messages are personal and should be written in private.

Explanation:

Letter A is an argument that actually contradicts the idea in the question.

Letter D is also an argument against what turning off the phone.

Letter F is just a weak argument overall, but also is pro having a cellphone on.

The others are basically explaining how cellphones can de distracting or inappropriate, therefore, they are the ones that fit the question.

to persuade readers which is answer c