Kenja invites children to a learning lab to determine if reading comprehension improves more from video instruction or with instruction from a live teacher. which research method is she likely to use?

Experimental research  

Explanation:

Experimental research is a method that conducts scientifically. It is the part of research design. In this experiment method, a set of variables is static and a set of experimental variables are to be measured under the scientific research method. When you don't have proper data you need to conduct an experimental research study. It is also called a quantitative research method. The experimental method conducts the cause and effect research methodology.  

Types of experimental research method:

Thus here Kenja used experimental research design to study research.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

i think it is the third one.