Read the following article and answer the question by choosing from the options.

OOOH , i think i am going to splurge and buy a cat condo for the monsters because i keep getting mad at them for scratching , but there is n't any good place for them to scratch other than the furniture . bah . the one i like best is 72 " tall , has 15 different perches on it , two cubby holes , 5 sissel ( sp ? ) scratching posts , two sets of " steps , " and 2 hanging birdy toys for the cats to bat at .

What may be the reason for them having to splurge on a cat condo ?
Available choices: [+] They do n't want visitors seeing the mess .; [+] Because they had to get rid of their furniture .; [+] Because they are cheap .; [+] They do n't want their furniture messed up .;...A:
They do n't want their furniture messed up .