Mark the letter A, B ,C ,or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Excavations in some villages on the east bank (A) of the Euphrates River have revealed (B) an ancient community that had been laying (C) under later (D) reconstructions of the city of Babylon
A. on the east bank
B. revealed
C. had been laying
D. later