Holding all other things constant, an increase in how sensitive customers are to price would affect:

the markup under the absorption costing approach to cost-plus pricing.

the markup used to compute the profit-maximizing price.

both the markup under the absorption costing approach to cost-plus pricing and the markup used to compute profit-maximizing price.

neither the markup under the absorption costing approach to cost-plus pricing nor the markup used to compute profit-maximizing price.