I need help on this pleasssee!!

Answer:
Option D. [tex]x=-3[/tex]
Step-by-step explanation:
we have
[tex]f(x)=\frac{5x^{4}-7}{x+3}[/tex]
we know that
The denominator cannot be equal to zero
therefore
To find the equation of the vertical asymptote equate the denominator to zero
so
[tex](x+3)=0[/tex]
[tex]x=-3[/tex] -----> equation of the vertical asymptote