Textel Is Thinking About Having One of Its Products Manufactured $30 \%$

Textel is thinking about having one of its products manufactured by a subcontractor. Currently,the cost of manufacturing 1,000 units follows:
Direct materal..........................................545,000
Direct labor.................................................30,000
Factory overtead ( $30 \%$ is variable) ............98,000 If Textel can buy 1,000 units from a subcontractor for $100,000,it should:

A) Make the product because current factory overhead is less than $100,000.
B) Make the product because the cost of direct material plus direct labor of manufacturing is less than $100,000.
C) Buy the product because the total incremental costs of manufacturing are greater than $100,000.
D) Buy the product because total fixed and variable manufacturing costs are greater than $100,000.
E) Make the product because factory overhead is a sunk cost.