What does this mean

Pia usually buys Close$-$up when she needs to buy toothpaste. The reason for preferring the brand is because of the toothbrush attached to it$.$ She had saved certain amount from her budget in buying toothbrush. If the time the company wanted to focus only in the offering of the core product when their $-$costs increases and eventually leads to higher price, what method of increasing prices will be considered?

Which of the following is correct.

Delayed quotation pricing

Escalator clauses

Unbundling

Reduction of discounts