John and his wife Martha get a divorce. Per the divorce settlement contract, Martha agrees to pay John alimony in the amount of $5000 per month for his lifetime or until such time as he should remarry. When John remarries three years later his alimony benefits cease because:

c) the condition subsequent has occurred;

Explanation:

Since in the question it is given that the John and his wife Martha get a divorce and according to the  divorce settlement contract she agrees to pay the alimony to John for $5,000 per month for his lifetime or until that time when he should remarry

If John remarries after three years, so the alimony benefits is ceased because the subsequent condition has occurred due to which he will not get the amount further in the future

answer; tech (a) is correct;