Question: What will be the most likely problem if proper phasing is not taken into consideration when connecting multi - wire branch circuits to a panelboard?

What will be the most likely problem if proper phasing is not taken into consideration when connecting multi-wire branch circuits to a panelboard?
a. under voltage of the branch circuit conductors
b. overloading of the ungrounded branch circuit conductors
c. overloading of the grounded branch circuit conductors
What will be the most likely problem if proper

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