Answer: a
Step-by-step explanation:
Answer:
A
[tex](\frac{a}{b^{3} } )^{4}[/tex]
[tex]a^{4}[/tex]/([tex]b^{3}[/tex][tex])^{4}[/tex]
[tex]a^{4}[/tex]/[tex]b^{12}[/tex]
