Selling price cannot be lowered as contribution margin cannot be sacrificed.
Explanation:
Sales prices can not be reduced because there can not be lost investment margins.
Promotions may not strengthen the criteria for purchases. Criteria for the purchase are usually related to brand performance and reliability.
Re-positioning it in order to make it smaller and better. MTBF is already a reliability factor and a purchasing criterion.
Therefore 1 and 4 solutions are likely to be true.
But let us take the 4th option, which is important to increase market share. It also speaks about re-positioning.