When an entity extends its geographical market to reach less dense customer bases and thus increases its sales volume, it is logical (assuming the mix of sales remains the same) that, in the short...

When an entity extends its geographical market to reach less dense customer bases and thus increases its sales volume, it is logical (assuming the mix of sales remains the same) that, in the short term at least (a) The cost of selling, as a % of sales, will increase (b) Cost of goods sold, as a % of sales revenue, will increase (c) The total cost of production will decrease (d) R&D expenses will be increased in absolute value