  The scaling behavior of model C describing the dynamical behaviour of the
$n$-component nonconserved order parameter coupled statically to a scalar
conserved density is considered in $d$-dimensional space. Conditions for the
realization of different types of scaling regimes in the $(n,d)$ plane are
studied within the field-theoretical renormalization group approach. Borders
separating these regions are calculated on the base of high-order RG functions
using $\epsilon$-expansions as well as by fixed dimension $d$ approach with
resummation.
