(A) There is a wide degree of variation in the chemical properties of different batches of rotting milk.
This weakens since the machines tests for smell rather than other chemical properties
(B) The scent of milk tends to change considerably between its packaging and its delivery to consumers, regardless of whether the milk is fresh or rotting.
IF it changes after packaging it's not much of any use we want it detected before deleviring
(C) Currently, dairy workers use a variety of characteristics to identify rotting milk, including checking the color and consistency of the milk.
Yes this weakens in buying the machine
(D) Certain compounds can be added to a batch of milk to ensure that the chemical composition of fresh milk produces a specific sweet scent, without altering any other chemical properties of the milk.
Definitely if the scent has to identified we have to have a machine that works as scent detection this strengthens lets hang on to it
(E) Dairy workers who are responsible for checking for spoilage while packaging milk carry out other duties related to the production of milk at times when checking for spoilage is not of top priority.
This also seemingly strengthen i have no idea as of how to eleminate either someone comment on it and notify otherwise i will provide some ad-hoc explanation like these people contribute to other functioning of the packaging which the machine cannot commit to and they can be made better to perform at spoilage
hence imo D