Sentence Correction

Quesstion 1: During the nineteenth century Emily Eden and Fanny Parks journeyed throughout India, sketching and keeping journals forming the basis of news reports about the princely states where they had visited.

(A) forming the basis of news reports about the princely states where they had
(B) that were forming the basis of news reports about the princely states
(C) to form the basis of news reports about the princely states which they have
(D) which had formed the basis of news reports about the princely states where they had
(E) that formed the basis of news reports about the princely states they

For question 1, I understand the correct answer is D. However, my question is on the word "Visit". Someone told me that I can NOT say "visit where"...so I can't say "where they visited" (as shown in the original sentence).

Can someone tell me why i can't say "visit where"? what should come after the word VISIT in general. does it have to be a specific place? I am not a native speaker. This may seem basic. Thank you.




Question 2: Margaret Courtney-Clarke has traveled to remote dwellings in the Transvaal to photograph the art of Ndebele women, whose murals are brilliantly colored, their geometrical symmetries embellished with old and new iconography and in a style that varies from woman to woman and house to house.

(A) whose murals are brilliantly colored, their geometrical symmetries embellished with old and new iconography and in a style that varies from woman to woman and house to house
(B) whose murals are brilliantly colored, their geometrical symmetries are embellished with old and new iconography, and their style is varying among women and houses
(C) whose murals are brilliantly colored, their geometrical symmetries are embellished with old and new iconography, and they are in styles that vary from woman to woman and house to house
(D) with murals brilliantly colored, their geometrical symmetries embellished with old and new iconography, and their style varies among women and houses
(E) with murals that are brilliantly colored, their geometrical symmetries embellished with old and new iconography, and their styles vary among women and houses


for question 2, The correct answer is A. I know that other choices are wrong, but i think A is wrong as well. Don't you need a word to connect two complete sentences? right before "their genometrical symmentries..."???

Please help!!!