writing a theoretical framework for a thesis on cross-selling mutual funds.

I am writing a thesis on the concept of cross-selling mutual funds. Cross-selling in this context means that an Asset Manager/bank who is creating & managing mutual funds has a distribution agreement with another bank, broker or platform to market and sell the mutual funds to their clients. One research question is ”What can we learn from the academic literature regarding mutual fund cross-selling?”.
A section of the thesis requires a set-up of a theoretical framework. The theoretical framework serves as an answer to the research question. All references, also in text, in APA, please.
I will attach the instructions & evaluation criteria to this request.
A simple literature review table is also required. (see instruction attachment)
I have also gathered several academic literature that might be interesting for the theoretical framework. I will attach them to this request. But feel free to use what is best suited.
Please also include something that challenges whether cross-selling mutual funds is ethical e.g. due to the possibility of kick-backs with these distributors who will push investment products that might not suit their current investment portfolio.