The correct answer is the following.
Although the question does not provide options, we can answer the following.
Marianne makes an educated guess that children who enter school having had no preschool exposure will have underdeveloped social skills that will need extra attention. This is an example of a predictive hypothesis.
What Marianne is doing is to take a guess based on her previous experience in educational environments. Although a predictive hypothesis does not guarantee anything because it does not provide hard facts, it serves as a reference due to the background of the individual in certain fields of study. It could include a projection, a forecast, or a probable scenario, according to the conditions presented in the past.