The federal rules aimed at protecting

[rjriks]

The federal rules aimed at protecting human subjects of medical experiments were established to ensure that patients must be warned of potential risks and an independent panel would evaluate the experiement before it was conducted.

A)must be warned of potential risks and an independent panel would
B)must be warned of potential risks and that an independent panel
C)are warned about potential risks and that an independent panel
D)will be warned about potential risks and an independent panel would
E)would be warned of potential risks and that an independent panel would

GMAT official Answer : E
My answer : C

Can't figure out any logic behind this official answer.Request for a good explanation.

Thanking you in advance !

[gokul_nair1984]

Searching beforehand saves time:)

http://www.manhattangmat.com/forums/the-federal-rules-aimed-at-protecting-human-subjects-of-t1127.html

[RonPurewal]

Searching beforehand saves time:)

http://www.manhattangmat.com/forums/the-federal-rules-aimed-at-protecting-human-subjects-of-t1127.html

gokul, thanks.