Use the description of the experiment, the diagram, and the graph to answer Numbers 3 and 4.

Students in a biology class studied the effects of temperature on the production of carbon dioxide by yeast cells. They designed an investigation using materials similar to those shown below. They counted the number of carbon dioxide bubbles produced by the yeast at different temperatures. The graph below shows the results.

According to the data, which of these is the best conclusion that can be made from this study?
	A	Carbon dioxide production by yeast cells is not influenced by temperature.

	B	Yeast cells produce more carbon dioxide at lower temperatures.

	C	The higher the temperature, the greater the production of carbon dioxide by yeast cells.

	D	Carbon dioxide production by yeast cells first increases then decreases as the temperature rises.