Question：Which of the following calculations could produce an acceptable figure for a trader's net profit for a period if no accounting records had been kept?

　　A. Closing net assets plus drawings minus capital introduced minus opening net assets

　　B. Closing net assets minus drawings plus capital introduced minus opening net assets

　　C. Closing net assets minus drawings minus capital introduced minus opening net assets

　　D. Closing net assets plus drawings plus capital introduced minus opening net assets

　　The correct answer is: Closing net assets plus drawings minus capital introduced minus opening net assets.