A Researcher Is Comparing a Plot of Agricultural Land Planted

A researcher is comparing a plot of agricultural land planted with Bt corn to a plot of agricultural land planted with non-GMO corn. Based on what she knows about Bt, she would expect to find

A) the Bt corn plants are shorter than the non-GMO corn plants.
B) fewer weed species in the Bt corn field.
C) an increased crop yield in the Bt corn field.
D) fewer corn kernels per cob on the Bt plants.