The correct answer is A. to take risk.
To sail close to the wind means to take risks. In sailing, this means sailing as close to the wind as possible without capsizing. This requires skill and courage, as there is a risk of being blown off course or even sinking. In life, taking risks is often necessary to achieve success. If you never take any risks, you will never achieve anything great. Of course, taking risks also comes with the possibility of failure. But if you are not willing to fail, you will never succeed.
The other options are not as relevant to the question. Option B, to manage the situation, is important for success in life, but it is not the same as taking risks. Option C, to work hard, is also important, but it is not enough on its own. Option D, to be regular, is not necessary for success in life. There are many successful people who are not regular in their habits.
In conclusion, the correct answer to the question “Those persons who are ready to sail close to the wind can be successful in life” is A. to take risk.