Currently, scientists estimate that 120 years is the _____ for human beings, because there is a limit to how long certain organ systems can last without replacement.
A) maximum life expectancy
B) longevity
C) useful life expectancy
D) average life expectancy

Question

Currently, scientists estimate that 120 years is the _____ for human beings, because there is a limit to how long certain organ systems can last without replacement.
A) ​maximum life expectancy
B) ​longevity
C) ​useful life expectancy
D) ​average life expectancy

Quizplus · Accepted Answer

The question is asking for the limit to human life expectancy based on the lifespan of certain organ systems. The term "maximum" implies a ceiling or highest possible point, which fits with the context of the question. Additionally, options B, C, and D all refer to some type of life expectancy, but do not specifically address the upper limit or maximum lifespan. Therefore, option A is the best choice.

Currently, Scientists Estimate That 120 Years Is the _____ for Human