What happens if you select Width in the Expressions dialog box and click the Delete key when Width=12 and Length=Width*2?

When you select Width in the Expressions dialog box and attempt to delete it, the system is designed to protect key variables that are being referenced in other expressions. In this case, Width is fundamental to the definition of Length, as Length is defined as twice the Width. Therefore, because Width is actively being utilized in another expression, the system prevents it from being deleted. This safeguards the integrity of expressions and ensures that dependencies remain intact.

Consequently, even if you attempt to delete Width by pressing the Delete key, the action will not take effect as the variable's relationship with Length necessitates its persistence. This ensures that expressions remain valid and functional within the design environment. The other options do not accurately represent the behavior of the software when dealing with dependent variables and expressions.