Which of these is the best reason for a firm to make a product in$-$house $($versus outsource$)?$

Which of these is the best reason for a firm to make a product in$-$house $($versus outsource$)?$

To avoid paying transaction costs.

When a firm has the capability to perform a strategically important activity better than other firms.

The firm lacks the marketing capability to sell the final product.

Making a component in$-$house provides flexibility to modify it as needed.