Mandy Had Limited Access to the Internet Growing Up, but When

Mandy had limited access to the internet growing up, but when she started college, she bought her first smartphone. Now that she can go online whenever and wherever she wants, she enjoys exchanging text messages with friends, uploading photos to Instagram, and posting her thoughts on her Facebook and Twitter accounts. To use online communication wisely, Mandy should

A) understand that only her friends can see her social media posts.
B) respond to messages immediately, regardless of the content.
C) understand that deleted social media posts may still be accessible.
D) select a simple password that she can remember and use it for all of her online accounts.