REIT valuation pricing question

see this question on REIT

An analyst gathers the following information for two REITs:

P/NAV** P/AFFO AFFO Payout Ratio Est. annual AFFO growth** REIT A 98% 12.8 X 50% 4.0% REIT B 101% 13.0 X 90% 3.5%

All else being equal, if both REITs have a 10 percent rate of return on retained and reinvested cash flows, which of the REITs is most attractively priced?

Can someone take me through why B is the right answer?

Also the whole Alternative Investment to me is like a huge blur, how much do we need to know?

P/NAV, P/AFFO, Payout are all better. Growth rate is marginally lower…

do you mind just go a liiiiiiiiittle bit deeper?