The correct answer is D: <span>put all his eggs in one basket
</span><span>Meaning: This is a piece of advice which means that one should not concentrate all efforts and resources in one area as one could lose everything. Example: Mr Tan's financial adviser urged him to be careful and not put all his eggs in one basket by investing all his money on stocks.</span>Source: <span>goodenglish.org.sg/improve-your-english/idioms/dont-put-all-your-eggs-in-one-basket</span>
