Which of the Following Statements Is Correct Based on a Survey

Which of the following statements is correct based on a survey of parents of adolescent girls in North Carolina by Reiter et al. (2009) ?

A) Parents who reported their daughter had been vaccinated were more likely to perceive the HPV vaccine as effective.
B) Parents who reported their daughter had been vaccinated were more likely to perceive more barriers and harms.
C) Parents who reported their daughter had been vaccinated were less likely to be confident that their insurance covered the cost.
D) All of these.