24. The first decision for most tenants living in a building undergoing being converted to cooperative ownership is if to sign a no-buy pledge with the other tenants.
(A) being converted to cooperative ownership is if to sign
(B) being converted to cooperative ownership is whether they should be signing
(C) being converted to cooperative ownership is whether or not they sign
(D) conversion to cooperative ownership is if to sign
(E) conversion to cooperative ownership is whether to sign
翻遍了所有的帖子，还是不明白这句话到底是什么意思，希望大家给予指点！我先谢过了！ | 
