Greta selected a research topic, decided what she wanted to learn about the topic, reviewed the literature on the topic, and formulated a hypothesis. What must she do next in order to continue in her research?

The next step for Greta is to choose a research method.

Explanation:

Greta has taken the first steps toward the completion of her research. She has a topic, she knows what she wants to learn about it - the problem -, and she has reviewed the literature on it, which is, by the way, a great tool to choose a method. Now, she has to take into consideration what she wants and needs to achieve her goal. Maybe she needs quantitative, maybe qualitative data. Maybe both. Are statistics important? Does she need to conduct a primary research, or are the data already available in a previous source? From those consideration, she can choose the best method.

if interdependence implies a two-way dependence, and if each partner is equally dependent on the other for success, then there is an equal commitment to the making the partnership successful. the advantage is sustainability of the relationship, the disadvantage is that decisions are "democratic" and therefore may take longer to reach and more likely to be a compromise (which is not always the best solution). as the interdependence moves away from equality, the decisions become more influenced by the more independent partner. in the extreme the relationship becomes more dictatorial and more like "master-slave". generally the relationship has less commitment in both directions and is more likely to be temporary.

if one generalizes (and one shouldn't), equity partnerships, which is probably what is implied by interdependence, can be slow to progress or change but durable. the extreme alternative, independent-dependent partnerships tend to be efficient but more fragile.

hope this but you will have to site your own evidence. : )