A research program is launched to produce genetically modified varieties of a food crop. The aim of the program is to create varieties with fruit that ripen quicker. Which idea can be used BEST in an argument against such research?

Responses
A New, unknown proteins may be produced by the modified plants.New, unknown proteins may be produced by the modified plants.
B The fruit from the modified crop might have a different taste.The fruit from the modified crop might have a different taste.
C The modified crop will reduce the sales of chemical fertilizers.The modified crop will reduce the sales of chemical fertilizers.
D Similar research programs in the past have led to harmful effects.

D Similar research programs in the past have led to harmful effects.