You are a portfolio manager and a new client, John Wick, has come to you for guidance. John is contemplating investing in three different stocks or forming three unique equally$-$weighted two$-$stock portfolios. John describes himself as a relatively cautious investor. John has access to projected returns for the three securities from $2013$ to $2019,$ presented in the table below:

$\backslash$table$[[,,$Assets,$],[$Year$,$A$,B_{?},C_{?}$