Hey what's the answer​ it's from my old text book

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Which of the following is a good strategy when it comes to desserts

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables