Which two sentences in this excerpt from The Time Machine by H. G. Wells suggest that the Morlocks possess a degree of intelligence comparable to that of humans?

The two sentences in this excerpt from The Time Machine by H. G. Wells suggest that the Morlocks possess a degree of intelligence comparable to that of humans are:

For once, at least, I grasped the mental operations of the Morlocks.

And

I was surprised to find it had been carefully oiled and cleaned.

You did not provide the excerpt but I wound it and the correct answers are the following two sentences:

1. For once, at least, I grasped the mental operations of the Morlocks.

Here we see that they do possess a kind of intelligence, maybe at first strange and unclear but it is there, no matter how strange it might seem.

2. I was surprised to find it had been carefully oiled and cleaned.

Here the Time Traveler has found his Time Machine and he finds that the Morlocks had tried to grasp its function and its purpose. They have taken it apart and then cleaned and oiled it, which suggests they know somethings about how the machine work.