Answer:
D. éste
Step-by-step explanation:
éste means this.
The sentence stated-
That book is white, but ___ is black.
A. this (feminine)
C. that (feminine)
The answer should be D because the book is masculine and the second part of sentence also indicate a book, and the only masculine in the answer choice is D.
Also, I did the test and got it right!
Hope this helps!
Have a great day!