help:OG CS24

The Right answer is E.

The first decision for most tenants living in a building undergoing conversion to cooperative ownership is whether to sign.

why there is no "the"or "a" between "undergoing conversion"?

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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）

(E) conversion to cooperative ownership is whether to sign

conversion 是做轉換、變換解釋，是不可數名詞，所以可以不加a, the,