Answer:
B.) He moved over a year ago, nevertheless, I cannot forgive him.
Explanation:
Out of the 2 answers you gave, this sentence is the most complete with its idea. Sentence A is a run on because it never pauses nor adds a conjunction to separate clauses.
Don’t take advantage of others, listen to people with an open mind, think about your your actions will affect others, don’t blame other for your mistake, and tell the truth.