An international convention regulating trade

This topic has expert replies
Moderator
Posts: 7187
Joined: Thu Sep 07, 2017 4:43 pm
Followed by:23 members
An international convention regulating trade in endangered species, especially bears and tigers, could be significantly weakened were it not for restrictions on captive breeding of endangered species, warn conservation and animal welfare groups.

(A) could be significantly weakened were it not for restrictions on captive breeding of endangered species, warn conservation and animal welfare groups.
(B) could be significantly weakened if restrictions on captive breeding of endangered species aren't eased, warn conservation and animal welfare groups.
(C) couldn't be significantly weakened without restrictions on captive breeding of endangered species being eased, warn conservation and animal welfare groups.
(D) can't be significantly weakened if restrictions on captive breeding of endangered species are eased, warn conservation and animal welfare groups.
(E) could be significantly weakened if restrictions on captive breeding of endangered species are eased, warn conservation and animal welfare groups.

Can some experts explain the best option?

OA E