A high school holds parent conferences at the end of every grading period, sends home monthly newsletters, and maintains a school Web site. A survey indicates that parents do not think they receive pertinent information from the school in a timely manner. Which of the following actions will best improve school-parent communication?
a) Hosting more frequent parent conferences
b) Sending daily newsletters to parents
c) Adding a parent portal feature to the school's existing student information system
d) Conducting bi-weekly school assemblies for parents