Advice on Post-Interview Case Study

Hello all.

After a job interview, I was given an assignment where I was tasked with selecting the top 3 High Yield ETFs from a list of 10 to possibly invest in. The data set provides returns, expense ratios, Sharpe and Sortino, standard deviation, tracking, information ratio, and some Morningstar ratings. My coursework did not do an adequate job of analytical work surrounding bonds and bond ETFs, so any advice on what due diligence I should be conducting and the approach for this analysis would be appreciated.