What Do Pablo Casals and Arthur Rubinstein Have in Common

Multiple Choice

What do Pablo Casals and Arthur Rubinstein have in common?

A) They are both individuals who contributed little until they were very old.
B) They are both people who were intellectually productive well into old age.
C) They are both scientists whose important discoveries were made in old age.
D) They are both examples of how old age gradually reduces mental abilities.