Respuesta :

Answer:

B

Step-by-step explanation:

Using the rule of exponents

[tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex]

[tex]a^{0}[/tex] = 1

Given

[tex]9^{c}[/tex] × [tex]9^{-c}[/tex]

= [tex]9^{(c-c)}[/tex]

= [tex]9^{0}[/tex]

= 1 → B

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