A、BECAusE thEy hAD hAD A hArD timE FinDing A pArking lot.
B、BECAusE thE pArk wAs ClosED BEForE thEy rEAChED thErE.
C、BECAusE thEy hAD jAmmED into A CrowDED pArking lot thErE.
D、BECAusE thE pArk wAs CrowDED with too mAny pEoplE.