The correct answer is B.) Mathew skips meals, sleeps an irregular number of hours, and smokes cigarettes daily.
Out of all the options listed above, Mathew is the one who engages most in habits that are harmful to his health. Firstly, skipping meals is bad for health since it can affect one's metabolism, lead to nutrient deficiencies and other other problems linked to underrating. Secondly, irregular sleep is associated with various problem, an increased risk for heart disease, and lower life expectancy. Finally, smoking cigarettes daily is obviously harmful for one's heart and lungs, and can cause cancer or heart disease.