Which of the following pairs share similar chemical properties? select one: a. oxygen (o) and chlorine (cl) b. helium (he) and hydrogen (h) c. fluorine (f) and neon (ne) d. bromine (br) and iodine (i)

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