What are the characteristics of a strong and effective research question? check all that apply. it is answerable without investigation. it can be answered with “yes” or “no.” it is answerable through investigation. it results in complex answers. it has a single definitive answer.

The correct answers are "It is answerable through investigation" and "It results in complex answers".

Explanation:

Research questions are doubts that inspire an investigation and are important enough to justify the expenses and effort of performing an investigation. Therefore, a strong and effective research question must be answerable through investigation. Additionally, it results in complex answers because in order to answer strong and effective research questions, a lot of data needs to be gathered and analyzed.

after the signature of the treaty of versailles in june 1919, germany lost nearly 25,000 square miles and a population of 7 million people. these territories included eupen-malmedy area and moresnet which were ceded to belgium. regarding relations with france, germany ceded the sovereignty of the saar coal mines to this country, as well as the provinces of alsace-lorraine.

explanation: