For the Boolean expression $$\overline {\text{A}} {\text{BC}} + {\text{A}}\overline {\text{B}} {\text{C}} + {\text{AB}}\overline {\text{C}} {\text{,}}$$ how many 1's are in the output column of the truth table
A. 2
B. 3
C. 4
D. 5
Answer: Option B
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