Student or Learner
New scientific discoveries are being made every day of the week,___78___unlike in other ages, new ideas are quickly applied in practical ways.https://www.google.com/search?hl=en&...+tremendous%22
Why is A the only correct answer here? Can't I just use B and C as well?
Note: It came from a passage so if you need a wider context, check here:
'But' introduces a comparison or contrast, unlike so or for.
These days, new discoveries are quickly applied in practical ways — in the past, they weren't.