Question

we must try to get at...... of the problem.=(root,rout,way,top)​

Answer 1

Answer:

root

Explanation:

root means the main reason of the problem as per the question

Answer 2

Answer:

We must try to get at the ROOT of the problem.

Explanation:

Root' is essentially a comprehension of the causes or premise of the problem. Consequently, getting to the root of understanding the premise of the problem could we at any point tackle it.

whereas,

'Route' and 'way' both allude to a way or street to go on.

Subsequently, B and C are not correct.

'Top' alludes to the outer layer of something. The significance framed isn't finished. So,  D is also wrong.