Back translations may not always ensure an accurate translation because of commonly used idioms in both languages. Which type of translation is used to overcome this problem?

E.  parallel translation.

Explanation:

Based on the information provided it can be said that the type of translation commonly used to overcome this problem is parallel translation. This is a type of translation in which two translators both work on the same text in order to create a back translation. This translation is later compared and analyzed, until the most appropriate translation is chosen for use.

i think it is the third one.

south, because if you took a map you would see texas is directly in the middle of east and west, but it is also downwards towards mexico, therefore it is south