Legal Elements of a Domestic complaint

Can you please tell me what legal elements in a domestic violence complaint, that the plaintiff will have to prove and to what level, preponderance or clear and convincing. From a defence stand point to what level do I have to discredit the claims, clear and convincing or beyond resonable?

The plaintiff must prove the defendant attempted to cause bodily injury, intentionally caused bodily injury or placed the plaintiff (or a member of the plaintiff’s family) in fear of imminent serious bodily injury, or continued harassment that rises to a level of causing emotional distress, or that the defendant committed an act of sexual assault against the plaintiff. A domestic violence complaint under Chapter 50B is a civil action and therefore the standard of proof is a preponderance of the evidence.