Which of the following is most likely a recommended procedure for compliance with the Standards of Professional Conduct relating to loyalty, prudence, and care Members should:

A. make their clients aware of all forms of manager compensation.
B. seek best execution for their clients in any circumstance.
C. diversify investments to reduce the risk of loss in any circumstance.

低合金钢管焊接时，不得在管子表面引弧，但可在焊口内引弧。