【单选题】

Which of the following sentences is not true according to the passage

A、After 3 000 years, each daughter language shared only 29% of the basic 200-word vocabulary.
B．SomeAleuts are the descendants ofEskimos on the mainland ofAlask
A、
C．The language clock can help to determine the dates of certain events.
D．Through thousands of years languages change only in vocabulary.