gwd27——18表目的？？？请帮忙看下

Q18:

The Near Earth Asteroid Rendezvous (NEAR) spacecraft will orbit the asteroid Eros for a year, slowly moving closer to the surface of the object to make ever more precise measurements that scientists hope will enable them to understand how the solar system formed some four billion years ago.

1. to make ever more precise measurements that scientists hope will enable them to
2. to make ever more and more precise measurements, which scientists are hoping to enable them
3. for making ever more precise measurements, and scientists hope that they will be able to

4. with the purpose of making more precise measurements than ever, and which scientists hope will enable them to
5. in order to make more precise measurements than it ever did, and scientists are hoping they will be able to

为何不是A

表目的用for doing?

A  :  to make ever more precise measurements that scientists hope will enable them to

hope will 结构错

表目的不定式和for皆可，看情况

in order to也曾作为过正确答案

with the purpose of 几乎没见过

还是不明白A为何错。。。scientists hope能否作为插入成分呢？就是:

to make ever more precise measurements that (scientists hope )will enable them to

The Near Earth Asteroid Rendezvous (NEAR) spacecraft will orbit the asteroid Eros for a year, slowly moving closer to the surface of the object to make ever more precise measurements that scientists hope will enable them to understand how the solar system formed some four billion years ago.

1. to make ever more precise measurements that scientists hope will enable them to 在这里scientists hope确实是插入成分 that will enable them to是不是这里them的指代不清错了？同样请教大家
2. to make ever more and more precise measurements, which scientists are hoping to enable them
           
3. for making ever more precise measurements, and scientists hope that they will be able to

4. with the purpose of making more precise measurements than ever, and which scientists hope will enable them to
           
5. in order to make more precise measurements than it ever did, and scientists are hoping they will be able to