The Grammar Translation Method in English Language
Teaching stresses on:

The correct option is Accuracy.

Explanation:
The Grammar Translation Method (GTM) is a traditional method of foreign language teaching. Its primary focus is on teaching grammatical rules and translating texts from the target language to the native language (and vice versa).
Because the instruction is highly structured around rules, syntax, and correct translation, the method stresses accuracy over fluency or appropriateness.
In GTM, learners are expected to attain high standards in translation and grammar tests, where errors are immediately corrected to ensure that the language produced is grammatically precise.