Answer:
I am pretty sure it's D. to teach strategy and critical thinking.
Producers must understand the marginal benefit of making an additional unit which shows the possible gain. Marginal benefit is used in business and economics as a measurement of the change in benefits over the change in quantity. Possible gain is one example of benefit. This measurement provides the relevant measurement of benefits at a specific level of production and consumption.
Answer:
In C++:
#include <iostream>
using namespace std;
int main(){
string fname,lname; int num;
cout<<"Firstname: "; cin>>fname;
cout<<"Lastname: "; cin>>lname;
cout<<"4 digits: "; cin>>num;
string login = lname;
if(lname.length()>=5){
login = lname.substr(0, 5); }
login+=fname.substr(0,1)+to_string(num%100);
cout<<login;
return 0;
}
Explanation:
See attachment for explanation where I used comments to explain each line