Twitter sees approximately 500 million tweets each day, about half of them in languages other than English. 500 million tweets each day is about 347,000 tweets each minute. Click here for the answer and explanation.
A, B, C – Incorrect: The present progressive tense that is used is not correct; the action is not gradual or continuing.
B, C, D – Incorrect: The use of proved itself creates an awkward and illogical phrasing.
E – Correct: This answer choice uses the correct tense and clearly describes the function of the software.
E is the correct answer.