Answer:
By writing everything she did, Maricella showed up solid information that demonstrates she reached the Formal operations stage in Piaget's theory two years early.
Step-by-step explanation:
All right to understand this question we need to analyze the context and the concept.
The formal operation stage in Piaget's theory says that in this stage the subject comprehends abstract topics, they manipulate them in their heads and they conduct inferences based on the analysis. In other words, the subject starts to create associations and get conclusions. this is what Maricella just did by associating one idea with another one and getting a conclusion. this stage is expected to be reached at the age of 12 years old.