The correct answer is C. val().
The val() function converts a string to a number. It can be used to convert a string that contains a number, such as “123”, to a numeric value, such as 123.
The str() function converts a number to a string. It can be used to convert a numeric value, such as 123, to a string, such as “123”.
The ucase() function converts a string to uppercase. It can be used to convert a string, such as “hello”, to “HELLO”.
The len() function returns the length of a string. It can be used to determine the number of characters in a string, such as “hello” (5 characters).
Here is an example of how to use the val() function:
Dim str As String = "123"
Dim num As Integer = Val(str)
In this example, the str variable is assigned the value “123”. The Val() function is then used to convert the string “123” to a numeric value, which is stored in the num variable. The num variable now contains the value 123.