Answer:
Yes it's possible but It would sound better If you said, positive and negative emotions.
Explanation:
Desirable and undesirable can have conflicting meanings I.e desirable is what you like and undesirable is what you don't like but you can desire something negative or have something good that's undesirable to you.
The best thing you can do is be very detailed. For example if the drawing was about a tree, explain the branches and the leaves and the background. You can never have to many details! hope this helps! :)
Explanation:
C
it shows the antecedent as Sam
Answer:
John announced, "The library is closing in five minutes."
it's correct