PEPcase has an advantage over RuBisCo. The advantage is
a) RuBisCo combines with O_2 but PEPcase do not
b) RuBisCo combines with NO_2 but PEPcase do not
c) RuBisCo conserve energy but PEPcase do not
d) PEPcase is present in both mesophyll cells and bundle sheath cells but RuBisCo is not