Specialist in diagnosing and treating mental disorders who can prescribe medication
Answer:
OD
Explanation:
Its the best way of avoiding infection and to you yourself its the protective. measure
Assuming that you're referring to Matt Cutts' 30 days challenge speech on Ted Talk,
He used an effective opening, in which he told the audiences why he's speaking while clearly stating his main points. He keep the audiences interested by referring them to something that the audience could relate to and an effective closing to persuade the audience to try his challenge
<span>C. 45 and 75 is your answer</span>