Answer:
C
Explanation:
You want the truth table that correctly represents A'B.
Truth tables
Each table supposedly shows the values of A' and A'B. A' is correctly represented when each "F" in the A column is replaced by "T" in the A' column, and vice versa. This is only the case for Choice C.
Choice C correctly represents the truth table for A' and A'B.
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Additional comment
The other choices also correctly represent A'B, but they incorrectly represent A'.
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