Doug sold his land to Kyra with the conditions that she cannot tear down the barn. When Kyra razed the barn, Doug exercised his right to re-entry. What type of estate did Doug grant to Kyra and what did he have to do to get it back?

a, determinable fee estate- Doug gets the property automatically

b. determinablr fee estate- Doug must go to court

c. fee simple subject to a condition subsequent - Doug gets the property automatically

d. fee simple subject to a condition subsequent - Doug must go to courtg