Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
Migrating birds return every year to their place of birth to lay their eggs.
A.Every year, to lay their eggs, migrating birds return to their place of birth.
B.Every year, on returning to their place of birth, migrating birds lay their eggs.
C.Every year, on returning to their place of birth, migrating birds lay their eggs.
D.Every year, on the journey back to their place of birth, migrating birds lay eggs.