Which one of the following is a statement of KirchhofFs voltage law?

• A. The total voltage in a parallel circuit is less than the value of the smallest voltage
• B. The algebraic sum of voltages in a loop is equal to zero
• C. The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
• D. The algebraic sum of voltages entering and leaving a point is equal to zero