Two students are comparing scientific experiments to investigations. They came up with the following ideas. Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year

One student gave an example of an investigation and the other gave an example of an experiment. Which student gave an example of a scientific investigation?

Student A because it requires a hypothesis
Student B because it requires a hypothesis
Student A because it can be done in natural settings
Student B because it can be done in natural settings