I think it is A because they can just destroy it but D is finding something natural to kill it off but it is GM so it wouldn't help so A
An isotonic solution is a solution in which the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell. Hope this helps. :)
Generally speaking if time is on the x-axis and the thing that’s changing is on the y-axis, a steep curve would indicate a rapid rate of change.
