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Logarithms and Zero

ACTMAT-KKQN2N

If:

$$\log (a) + \log (b) = 0$$

...then $ab = ?$

A

$0$

B

$ \cfrac{1}{4} $

C

$1$

D

$10$

E

$\text{ No answer is possible, as the equation } \log (a) + \log (b) = 0 \text{ has no solution }$