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.

the third answer

explanation:

because

2. list two reasons why fossil fuels should no longer be used as a source of energy in america.