Which Statement Pertains to Parallel Translation

Which statement pertains to parallel translation?

A) A committee of translators,each of whom is fluent in at least two of the languages in which the questionnaire will be administered,discusses alternative versions of the questionnaire and makes modifications until consensus is reached.
B) Repeat translations and back translations may be necessary to develop equivalent questionnaires,and this process can be cumbersome and time consuming.
C) The questionnaire is translated from the base language by a bilingual speaker whose native language is the language into which the questionnaire is being translated.
D) If the translator is not fluent in both languages and not familiar with both cultures,direct translation of certain words and phrases may be erroneous.