In Boolean algebra,$Y = A + B$ represents . . . . . .
- AThe output $Y$ exists only if both inputs $A$ and $B$ exist.
- BThe output $Y$ exists if $A$ or $B$ or both $A$ and $B$ exist.
- CThe output $Y$ exists if $A$ or $B$ exists,but $Y$ does not exist if both $A$ and $B$ exist.
- DThe output $Y$ exists if both $A$ and $B$ exist,but $Y$ does not exist if only $A$ or $B$ exists.
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