The default authentication option for external trusts is domain-wide authentication

Given the following template function definition, which of the following is not a valid invocation of the function?

template void swap(T& left, T& right) { //implementation goes here, not relevant to the question } int int1, int2; float flt1, flt2; char ch1, ch2; string s1, s2; a. swap(s1,s2); b. swap(int1, int2); c. swap(ch1, ch2); d. swap(int1, ch2);

Using templates in your program where warranted, is an example of

a. data abstraction b. polymorphism c. information hiding d. algorithm abstraction