And operator checks both the sub-conditions whereas AndAlso operator does . . . . . . . .

The correct answer is: A. Short-circuit evaluation

The And operator checks both the sub-conditions, whereas the AndAlso operator does short-circuit evaluation. This means that if the first condition is false, the second condition will not be evaluated.

For example, the following code will print “True”:

bool a = true;
bool b = false;
bool c = a && b;
Console.WriteLine(c);

However, the following code will print “False”:

bool a = true;
bool b = false;
bool c = a && b;
Console.WriteLine(a);

This is because the And operator evaluates both conditions, even though the first condition is already true. The AndAlso operator, on the other hand, will only evaluate the second condition if the first condition is true.

Here is a table that summarizes the behavior of the And and AndAlso operators:

| Condition 1 | Condition 2 | And | AndAlso |
| — | — | — | — |
| True | True | True | True |
| True | False | False | False |
| False | True | False | False |
| False | False | False | False |

I hope this helps!