Final answer:
The recommended frequency for oral care is at least two times per day to maintain good dental hygiene and prevent tooth decay and gum disease.
Step-by-step explanation:
The recommended number of times per day for oral care, specifically brushing teeth, is at least two times. This helps remove plaque and food particles to prevent tooth decay and gum disease. It's also beneficial to floss daily to clean the spaces between your teeth where a toothbrush might not reach. Therefore, the correct answer to the question, 'Oral care should be done at least ___ time(s) a day,' is B) Two.