A、The pitfalls of stress. B、How to manage stress. C、The realities of stress. D、Why stress is bad. C题目问的是谈话主要是关于压力的哪一方面。综合全文可知，这谈

It’s hard to get through a day without hearing or reading something about stress. Some doctors refer to stress as some kind of new plague. However, numerous surveys confirm that the problem has progressively escalated since the 1980s. Why all of the commotion? After all, stress has been around since Adam and Eve were in the Garden of Eden.
    Stress is an unavoidable consequence of life. Without stress, there would be no life. However, just as distress can cause disease, there are good stresses that offset this, and promote wellness. Increased stress results in increased productivity—up to a point. It’ s very much like the stress on a violin string. Not enough strain produces a dull, raspy sound. Too much makes a shrill, annoying noise, or causes the string to snap. However, just the right degree can create magnificent tones. Similarly, we all need to find the proper level of stress that promotes optimal performance, and enables us to make melodious music.
    Q19: What aspect of stress is the talk mainly about?
    Q20: What is NOT true about stress?
    Q21: How can we deal with stress according to the doctor?