OG 201 lowering 是adj?

201. One view of the economy contends that a large drop in oil prices should eventually lead to lowering interest rates, as well as lowering fears about inflation, a rally in stocks and bonds, and a weakening of the dollar.

(A) lowering interest rates, as well as lowering fears about inflation,

(B) a lowering of interest rates and of fears about inflation,

(C) a lowering of interest rates, along with fears about inflation,

(D) interest rates being lowered, along with fears about inflation,（B）

(E) interest rates and fears about inflation being lowered, with

At issue is the need for logical and formal parallelism in a coordinate series. B, the best choice, clearly and correctly uses parallel noun phrases to list three effects of a drop in oil prices: a lowering of..., a rally in..., and a weakening of.... In place of the correct lower before fears, choice A uses an incorrect participial adjective, lowering, that could cause confusion by seeming at first to function as a verb. (动名词作名词用要慎重！) A also violates parallelism. In C and D, the use of along with confuses meaning by making fears about inflation an independent effect, not an object of lowering. D and E violate parallelism by substituting an awkward gerund clause for the first noun phrase.

A uses an incorrect participial adjective, lowering, that could cause confusion by seeming at first to function as a verb. (动名词作名词用要慎重！) 请问 participial adjective是动名词吗, 还是adj , 豆语法很差, 望高人指点, 谢谢!

thanks, 现在分词做adj, right?对,有歧义.

再问:  那doing后面就不要+ N了, 都有歧义?

(动名词作名词用要慎重！) 这个大全伤得注解应去掉,把我绞糊涂拉!

I have a question about 动名词. Here we use "a lowering of interested rates". When the 动名词 should have "a"?