Answer:
C) co-marketing
Step-by-step explanation:
Co-marketing takes place when two different companies joint efforts and carry out joint promotional campaigns for an offer that includes products or services from both brands. In co-marketing, both companies will generally promote their share of the products, e.g. Prime Vera promotes a new range and Silibakes promotes silicon baking cups. But at the end, bot companies benefit from the promotional efforts carried out by the other company.
A very famous and notorious co-marketing effort that has been going on for decades now and includes more than two brands is the "Intel inside" logo seen at computers.