Answer:
The amount of trials that shouldbe in each block for Amber’s experiment are:
Three
Step-by-step explanation:
There are two reasons for defining this answer. The first one is that we are taking three general categories to distinguish the three types of elements that form part of the study. Second, these elements will be presented to the individuals and they should at least be offered one option for each group. Therefore the correct question is three. Because we need to include at least an option for each group.