Researchers Studied Anxiety Among a Sample of 1200 Hospitalized Patients

Researchers studied anxiety among a sample of 1200 hospitalized patients. Study participants were divided into three age groups and an ANOVA test was utilized to assess differences in distress from anxiety (scale of 0-10) . The researchers report that those 65 years and younger had higher distress from anxiety compared to the two other age groups. You know this means:

A) The researchers should have completed a paired t-test because the patients were all from the same hospital.
B) The F statistic was significant.
C) The p value was > alpha in the 65 and under age group.
D) A type I error was made because the researchers did not use a repeat measures ANOVA.