option A & E are contenders here
we can negate B,C & D on , but as no two IC are to be connected
(E) reported, indicating that the vaccine or the vaccination program is not effective
, nonetheless, no changes to polio campaigns are nonetheless is a non essential modifier which if removed makes sentence incorrect
(A) reported, thereby indicating that the vaccine or the vaccination program is not effective; however, no changes to polio campaigns have been ;use of semicolon creates clear distinction b/w IC's
option A is correct
Bunuel wrote:
Since the WHO announced the complete eradication of the disease, 77 polio cases have been reported, thereby indicating that the vaccine or the vaccination program is not effective; however, no changes to polio campaigns have been made till now.
(A) reported, thereby indicating that the vaccine or the vaccination program is not effective; however, no changes to polio campaigns have been
(B) reported, which indicate that the vaccine and the vaccination program are not effective, but no changes to polio campaigns have been
(C) reported, having indicated that the vaccine or the vaccination program is not effective, but no changes to polio campaigns have been
(D) reported and thereby indicate the effectiveness of the vaccine or the vaccination program, but no changes to polio campaigns are
(E) reported, indicating that the vaccine or the vaccination program is not effective, nonetheless, no changes to polio campaigns are