You can tell from the title. The absolute value of x- 1 is the reciprocal of itself.

So (x- 1) is less than or equal to 0.

So x is less than or equal to 1.

So choose B?

The simple way to solve this kind of problem is

The absolute value of any number must be a number greater than or equal to 0.

So in this question? The right side of the equation (1-x) is greater than or equal to 0.

So x is less than or equal to 1?

Self-taught children are bound to make a difference?

A good scholar is inferior to a musician.

I wish you travel in the universe of knowledge!