Answer:
D
Explanation:
Because he smiled and lied about his foe, when his foe was dead.
Stalin
I attached a picture so you can look at the explaination.
If you want to incorporate 'for a year", you would need to say 'I have been in Poland for a year.'
But as 'been to' suggests just a visit and not a long stay, you may want to use "I had gone to Poland a year ago.'
B.
