PLEASE HELP! 5tH GRADE SCIENCE! Which of the following mixtures can be separated by using both magnetic attraction and shape as observable properties? A. Baking soda and flour B. Dry leaves and marbles C. Iron nails and wood shavings D. Plastic beads and dice

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