I got the right answer but I want to check the thought process of the experts. After few answers, I will also write down how I approached this during the examination.

let's understand :-

A transitional phrase is something like “for example” or “in other words.” A sentence with a transitional phrase could read as follows:

I have a big test tomorrow; as a result, I can't go out tonight.

(C) has it !
_________________

" Make more efforts "
Press Kudos if you liked my post

A). not only encode the timeframe of an event but also imply the origin of the speaker's knowledge, which may be direct observation, hearsay, or intuition, resulting in speakers of those languages who cannot state facts without an attribution to some source ----- languages who cannot speak does not make sense


B). not only encode the timeframe of an event but also the origin of the speaker's knowledge, direct observation, hearsay, or intuition; therefore, speakers of those languages cannot state a fact without some source of attribution ….. not only verb … but also noun –un//.

C). encode not only the timeframe of an event but also the origin of the speaker's knowledge, whether direct observation, hearsay, or intuition; as a result, speakers of those languages cannot state facts without attributing them to a source ---- correct choice that specifies by using whether, the speaker’s knowledge is from direct observation, hearsay, or intuition

D. do not encode the timeframe of an event; they also imply the origin of the speaker's knowledge -- whether direct observation, hearsay, or intuition -- resulting in the inability of those languages' speakers to state facts and not attributions to some source --- do not en code is totally opposite to do not only encode. Meaning diametrically changed.

E. not only encode the timeframe of an event but also imply the origin of the speaker's knowledge, direct observation, hearsay, or intuition; speakers of those languages, therefore, do not state facts without attributing them to sources …. The origin stands good for all the four factors. --- 1.speaker's knowledge, 2.direct observation, 3. hearsay, or 4. intuition. Origin should stand for only speaker’s knowledge

_________________

” I truly believe in online learning, I have been a student in both an Ivy League school (brick and mortar) and in an online setting and I have learned 1,000 times more in an online setting. You do not have anyone there lecturing you and then you do the work, online you are made to do it all yourself. Amazing how different the results are. - Heather(a student)”

Alicia Helle, an online student at the UW, "Obtaining my degree online has been a blessing. With two small children, I am able to work when it is convenient for my family and me. I have nothing but positive comments and experiences from my time at UW-Stout.”

Find out what's new at GMAT Club - latest features and updates