Anthropologist: Scientists have found that the proportion of people surviving to old age more than quadrupled about 30,000 years ago. This boost in longevity was probably instrumental in the development of sophisticated cave art, because engaging in art required leisure time, and ________.Which of the following would, if true, most logically complete the anthropologist's argument?

This statement undermines the argument by suggesting that essential conditions for creating art were not present, thus failing to support the notion that increased longevity influenced artistic development. It does not logically connect longevity with the emergence of cave art, making it irrelevant.

While this choice acknowledges a timeline for the growth of cave art, it does not establish a causal relationship with the increase in longevity. It merely states an observation without explaining how longer lifespans contributed to the sophistication of the art, thereby failing to complete the anthropologist's argument.

This option incorrectly reverses the causal relationship. It suggests that more leisure time leads to increased life expectancy, which does not directly support the argument that longer lifespans facilitated the development of art. It lacks the necessary connection to responsibilities and knowledge transfer.

This statement indirectly implies a link between leisure and art but does not address the role of older individuals in nurturing artistic development. It fails to directly support the argument that longevity allowed for the transfer of survival responsibilities which would enhance artistic expression.