  Nuclear reactions drive the stellar evolution and contribute to the stellar
and galactic chemicals abundances. New determinations of the nuclear reaction
rates for key fusion reactions of stellar evolution are now available, paving
the way to improved stellar model predictions. We explore the impact of new
C12+C12 reaction rates for massive stars evolution, structure, and
nucleosynthesis during core carbon-burning phase. We analyse the consequences
for stars of different masses including rotation-induced mixing. We computed a
grid of massive stars at solar metallicity using the stellar evolution code
GENEC. We explored the results using three different references for the rates,
with or without rotation. We study the effect in terms of evolution, structure,
and critical mass limit between intermediate and massive stars. We explored the
consequences for nucleosynthesis during the core C-burning phase by means of a
one-zone nucleosynthesis code. We confirm the significant impact of using the
recent nuclear reaction rates following the hindrance hypothesis as well as the
mass-dependent effect of a resonance at 2.14 MeV. This impacts the
characteristics of the core of stars from the C-ignition and during all the
core C-burning phase. The change of rates modifies the central nucleosynthesis
during the core C-burning phase, resulting in an underproduction of s-process
elements. The correct and accurate determination of the nuclear reaction rates,
with especially the existence and location of resonances, impacts stellar
evolution in many aspects affecting the model predictions. The choice of the
nuclear reaction rates reference for the C12+C12 fusion reaction changes
significantly the behaviour of the core during the C-burning phase. This choice
is then to be taken carefully in order to interpret stellar evolution and fate
of massive stars.
