What's the distinction between these text?\nText A:“Measurement Date”: (i) Any Determination Date, (ii) the date as of which the information in any Monthly Report is calculated and (iii) with five Business Days’ prior written notice, any Business Day requested by the Rating Agency.\nText B:“Measurement Date”: (i) Any day on which a purchase of a Collateral Obligation occurs, (ii) any Determination Date, (iii) the date as of which the information in any Monthly Report is - 45 - calculated, and (iv) with five Business Days’ prior written notice, any Business Day requested by athe Rating Agency and (v) the Effective Date.