Theidentifiers in the system-provided header files such asiostream, cmath, and iomanip are defined in thenamespace
a.
cctype
c.
std
b.
stdl
d.
stdlib

Kou converged his word document to a powerpoint document. when he received the powerpoint, he was missing material. which most likely explains why the material was missing? a it did not have a proper heading b he incorrectly copied and pasted it c he did not save his document properly d there was not enough space in powerpoint