A looks good.
The health issued a notice regarding the guidelines for the protection of human subjects,reiterating that research that is neither conducted by an organization specializing in projects involving the use of human subjects nor
supported by government agencies supervising such projects is still subject to regulation by an institutional review board.
A)
supported by government agencies supervising such projects
is still sibject to regulation by an institutional review board - correct
B)
is supported by government agencies supervising such projects is still subject to regulation by an institutional review board - not parallel
C)
is supported by government agencies supervising such projects that
are still subject to regulation by an institutional review board - not parallel and 'are' is incorrect for singular 'research'
D)supported by government agencies supervising such projects that are still subject to regulation by an institutional review board - 'are' is incorrect for singular 'research'
E)
that is supported by government agencies supervising such projects is still subject to regulation by an institutional review board - not parallel