Emotional security may bolster or confirm loving knowledge. Not likely to be the hoped-for answer.
Logical knowledge (aka knowledge of logic, per English) is not so much belief as it is the progression of orderly thought processes. If one begins with erroneous beliefs, proper logic will confirm the validity of the reasoning, but not the truth of the alleged knowledge. So, not the answer either.
Confirmation that the belief is true is vague; it could be cherry picking, confirmation bias, or 5 sigma confirmation in a correctly designed experiement. To confirm something is to validate it as true (knowledge); this statement is a tautology, and may have been intentionally designed to be too vague to be true. Answer: "not always, not necessarily, unless what 'confirmation' means is defined by instructor."
Empirical evidence is likewise too vague, but perhaps intended to mean well-designed experimental evidence. If so, answer d is closest to "the truth." However, if your instructor raises the question of "what is 'empirical evidence?', that indicates he or she has deliberately designed the answer to be vague.