The exhibition of art from Nubians, the site of a Black civilization that goes back to the fourth millennium B.C., makes clear
the Nubians combined artistic elements from Egypt to that of sub-Saharan Africa.
(A) the Nubians combined artistic elements from Egypt to that
(B) that the Nubians combined artistic elements from Egypt to that
(C) the Nubians combined artistic elements from Egypt with that
(D) that the Nubians combined artistic elements from Egypt with those
(E) that Nubians combined artistic elements from Egypt and those
To start off, you cannot say "combine A to B", it is the wrong usage of the word combine so it has to be "combine A with B".
Therefore, options A and B are out.
If you look at option E, here also, the word "combine" is being used with "and" so for this reason, you can strike off option E.
Next, if you check the prompt, we are combining "elements", the plural form, so we cannot use "that". the singular form. Hence we have to use "those" with "elements".
Therefore, option C is out.
Now, you are left with option D, which has all the correct ingredients, and hence the correct choice.