```INSTRUCTION: Read the passage carefully and answer the questions 1-5 that follow
All over the world till lately, and in most of the world till today, mankind has been following the course of nature: that is to say, it has been breeding up to maximum. To let nature take her extravagant course in the reproduction of the human race may have made sense n an age in which we were also letting her take her course in decimating mankind by the casualties of war, pestilence, and famine. Being human, we have at least revolted against the senseless waste. We have started to impose on nature's heartless play, a humane new order of our own. But, once man has begun to interfere with nature, he cannot afford to stop half way. We cannot, with impunity, cut down the death-rate and at the same time allow the birth-rate to go taking nature's course. We must consciously try to establish an equilibrium or, sooner or later, famine will stalk aboard again.```
The main idea of this passage is that

• A.nature is heartless
• B.man should control the birth rate
• C.mankind will soon perish of starvation
• D.pestilence causes more deaths than war
• E.man should change nature's course gradually