(A) systems, which is still a subject of debate between
(B) systems, which are still debated between
(C) systems still debated among
(D) systems, a theory still debated by
(E) systems, a theory still debated between
7. Less detrimental than the effects of bacterial transformation is the effects of bacterial deterioration: spoilage of food, metals corroding, decay of wood, and other undesirable alterations of substances.
(A) is the effects of bacterial deterioration: spoilage of food, metals corroding
(B) are the effects of bacterial deterioration: spoilage of food, metals corroding
(C) is the effects of bacterial deterioration, which include spoilage of food, metals corroding
(D) are the effects of bacterial deterioration, which includes spoilage of food, corrosion of metals
(E) are the effects of bacterial deterioration: spoilage of food, corrosion of metals
8. One pervasive theory explains the introduction of breakfast cereals in the early 1900s as a result of the growing number of automobiles, which led to a decline in horse ownership and a subsequent grain glut; by persuading people to eat what had previously been horse feed, market equilibrium was restored.
(A) by persuading people to eat what had previously been horse feed, market equilibrium was restored
(B) persuading people to eat what had previously been horse feed restored market equilibrium
(C) by persuading people to eat what had previously been horse feed, it restored market equilibrium
(D) the persuasion of people to eat what had previously been horse feed restored market equilibrium
(E) market equilibrium was restored when people were persuaded to eat former horse feed