Which sentence is written in the subjunctive mood?

A) Win the lottery, please!
B) I won the lottery and donated half of it to charity.
C) When I win the lottery, I will donate half of it to charity.
D) I might win the lottery one day if I'm really lucky.

I think it is a

No, A is in imperative mood.

Study this: http://grammar.ccc.commnet.edu/grammar/verbs.htm#mood

Then let us know what you decide. No guessing!

Right!!

Thank you so much!

You're very welcome!

Yes, you are correct. Sentence A), "Win the lottery, please!", is written in the subjunctive mood. The subjunctive mood is used to express something that is hypothetical, desired, or contrary to reality. In this sentence, the speaker is expressing a desire or a hypothetical situation of winning the lottery. The use of the verb "win" in its base form without any change in tense or form is an indicator of the subjunctive mood.