Answer:
B.
Will providing sunflowers with Fertilizer X cause the flowers to produce more seeds?
Step-by-step explanation:
The question B is a sort of untested idea. It is the ideal hypothesis for Regina to test and see if the brand of the fertilizer will improve her sunflower seed production.
To scientifically carryout this test, Regina must set up an experiment. The experiment will help her affirm her grandfather's observation about the fertilizer.
The dependent variable here is the yield of the sunflower as we know. The sunflower will produce more seeds based on how nourished it is with available nutrients.
In her experiment, she can use the normal soil, soil with fertilizer x and maybe organic manure mixed with soil to compare different results. She then proceeds to plant her seed and on the long run observe the output.
From the result of her experiment, she can then conclude on her hypothesis. With the experiment, she can prove wether the fertilizer will improve the yield of the seeds or not.