Identify a true statement about thesheet.parentStyleSheetproperty. Question $2$Answer a$.$ It describesthe object collection of style rules within the style sheet. b$.$ It describesthe URL of the style sheet file or an empty text string for an embedded style sheet. Incorrect c$.$ It describes a Boolean value to indicate whether the style sheet is enabled $($false$)$ or disabled $($true$).$ d$.$ It describesthe style sheet object containing the style sheet inserted via the @importrule.