Read the following paragraph from the section "Some Gestures Are Too Complex For Cars. " Company officials have pointed out that self-driving cars still "don't understand certain complex situations such as a construction worker communicating using hand gestures."

Which of the following can be inferred from the paragraph above?
A Self-driving cars will eliminate the need for construction workers to direct traffic.
B Self-driving cars may have trouble adapting to unexpected or unfamiliar situations.
C Self-driving cars will perform complex forms of communication with humans.
D Self-driving cars may not be the best choice of vehicle to use for construction jobs.

In some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. the production of sterile male ligers is an example of read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. the production of sterile male ligers is an example of a postzygotic barrier the founder effect sympatric speciation a prezygotic barrier

Montesquieu suggested dividing government into

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.