Your Independent ANOVA Experiment Has a Significant Main Effect

Your independent ANOVA experiment has a significant main effect. Your independent variable (IV) has three conditions and your hypothesis is one-tailed. What further analysis do you need to do?

A) Do nothing; you don't need to interpret any further directional effects.
B) You need to use means to interpret which condition has a significantly higher score.
C) You need to conduct further analysis to break down the main effect and, as you have one-tailed hypothesis, you have to do planned contrasts.
D) You need to conduct further analysis to break down the main effect and, as you have one-tailed hypothesis, you have to do post hoc contrasts.