thE ExplAnAtion oF thE unDErlinED "turning thEir EArly promisEs into prACtiCAl rEAlity" is ______.
A．EArning thEir living AnD kEEping promisEs
B．Doing prACtiCAl joBs AnD FACing rEAlity
C．Doing whAt thEy hAvE promisED
D．rEAlizing whAt thEy wErE ExpECtED