It is believed that GM crops could transfer genes to wild plants through and hybridization.

the wires in the toaster turning red and the toast crisping and turning brown

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

b is the answer and if you need further with anything message me