Question

Consider the following code:

Answer 1

Answer:

customers += newCustomer;

Explanation:

The operator += expands into + and assignment. The assignment is not overloaded so the required code is

customers += newCustomer;

This expands into

customers = customers + newCustomer;

The overloaded + operator is called for the right expression. This returns a `CustomerList`, which is then assigned through the = operator to `customers`.