What Would the Following Proposition Be in Standard Form? the Plant

What would the following proposition be in standard form? The plant will die unless you water it.

A) If the plant doesn't die, then you didn't water the plant.
B) If the plant dies, then you didn't water the plant.
C) If the plant dies, then you watered the plant.
D) If you don't water the plant, then the plant will die.
E) If you water the plant, then the plant won't die.