两道语法重要，题号是我加的，看看选谁？

1. The Environmental Protection Agency’s proposal to place restrictions on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, saying that the move will exacerbate the nation’s fuel supply problems.

A.      on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, saying

B.     on both diesel fuel and engines have sparked the oil industry to counterattack, and they say

C.     on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, which says

D.     both on diesel fuel and engines has sparked the oil industry to a counterattack, saying

E.     both on diesel fuel and diesel engines have sparked the oil industry to counterattack, and it says

2. After several years of rapid growth, the healthy care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.

1. while it then proved unable to handle the increase in business, falling months behind in its payment to

2. while it then proved unable to handle the increase in business and fell months behind in its payment to

3. but then it proved unable to handle the increase in business, falling months behind in its paying

4. but then proving unable to handle the increase in business, falling months behind in paying

5. but then proved unable to handle the increase in business, falling months behind in paying