On finite unions and finite products with the D-property

We show that the product of a subparacompact C -scattered space and a Lindelِf D-space is D. In addition, we show that every regular locally D-space which is the union of a finite collection of subparacompact spaces and metacompact spaces has the D-property. Also, we extend this result from the class of locally D-spaces to the wider class of D -scattered spaces. All the results are shown in a direct way.