Rice prices must be kept within reach of the poorest people.
I would say D. Fossil fuels must be burned to release their energy.
The correct answer should be D. Studies have been inconclusive regarding the nutritional value of organically grown food and conventionally grown food.
There has yet to be found a conclusive evidence that organic food is better. Most of the things that people hate about regular food is easily removed either by washing the food such as fruits or vegetables or by cooking them in any way. Risks of illnesses and diseases is also not related to the difference between them.
The answer is (b.) the first gulf war
The first gulf war is between the coalition forces led by the US against Iraq. It is also know as Persian gulf war, Kuwait war, first Iraq war, or Iraq war. It started on August 2, 1990 and ended on February 28, 1991. While the six-day war is the conflict between Israel and Egypt in 1967 and Yom Kippur War in 1973.
Superposition and geologic timescale support the theory because of the changes in features in index fossils of diverse periods are presumed to be caused by evolution, and the existence of different organisms in different periods is then used to support biological evolution.