First compute the coefficient like this:
[tex]C_5^1=\frac{5!}{1!(5-1)!}=\frac{5!}{4!}=\frac{5\times4!}{4!}[/tex]
Simplifying the fraction over 4! we get:
[tex]C_5^1=5[/tex]
and the variables are [tex]s^4v[/tex]. So answer [tex]5s^4v[/tex].
The correct answer is C then.
