Which of the following statements about the maximum lifespan for humans is true?

A) The longest-lived person, whose age could be documented, was a woman who lived to 112 years.
B) In the United States, the maximum lifespan for women is 81 years and for men is 76 years.
C) Some scientists say that 122 years is the upper bound of human longevity, while others say that it can be extended.
D) Scientists agree that it is more important to extend the maximum lifespan than the average healthy life expectancy.

C