Estimated to be about 15,000 years old, it is a relative baby compared with Earth’s other very large lakes, __( 117 )__ more than two million years old.
Giải thích
B. which can be
Mệnh đề quan hệ bổ nghĩa cho Earth’s other very large lakes
B. which can be
Mệnh đề quan hệ bổ nghĩa cho Earth’s other very large lakes