In VB, the. . . . . . . . is the function that computes the square root of a number.

The correct answer is A. sqrt().

The sqrt() function returns the square root of a number. It is a built-in function in VB.

The round() function rounds a number to the nearest integer.

The abs() function returns the absolute value of a number.

The len() function returns the length of a string.

Here is an example of how to use the sqrt() function:

Dim x As Double
x = 9
Dim y As Double
y = Sqrt(x)
MsgBox y

This code will display the message box with the number 3.