we know that
the expression " one over \((3p+15)\)" is equivalent to
\(\frac{1}{(3p+15)}\) --------> expression A
and
\(3p+15=3(p+5)\) --------> expression B
substitute the expression B in the expression A
\(\frac{1}{(3p+15)}=\frac{1}{3(p+5)}\) -----> one over three\((p + 5)\)
therefore
the answer is the option
one over three(p + 5)
