Mary Completed an Online Application Form for an Internship

Mary completed an online application form for an internship.Before clicking 'send', she reviewed her answers and searched for errors.She noticed that she had completed a section that was meant for office use only.She quickly deleted her response, and clicked the 'send ' button.She felt like she did this too soon.When she printed out her application, she noticed she had filled in a field incorrectly.Mary's biggest mistake was her failure to:

A) check and recheck her work more than once.
B) fill in the information pertinent to her.
C) reading directions carefully.
D) scan the entire form before filling it out.