Because of the fear that the company's latest efforts to contain the spill, which had started three months ago when a leased rig sank, might falter, BP shares fell in London and New York.

(A) had started three months ago when a leased rig sank, might falter, BP shares fell
(B) had started three months ago when a leased rig sank, might falter, BP shares had fallen
(C) started three months ago when a leased rig sank, might falter, BP shares fell
(D) started three months ago with the sinking of a leased rig, might falter, BP shares fell
(E) started three months ago with the sinking of a leased rig, might falter, BP shares had fallen



OA D

Source: e-GMAT