Answer:
a)safe sex
d)symptoms
Explanation:
Naomi is talking about sexually transmitted diseases in her seminar, so it is clear that she must talk about the practice of safe sex, using condoms, as this is the best and most efficient way of not contracting these diseases. However, Naomi should not leave the symptoms of the disease out of the seminar, because it is important to expose them, so that the audience recognizes whether they may have any of these diseases at some stage in life.
