Which sentence is grammatically correct? 'The data from the study suggests (A) that there are (B) more variability in the results than previously observed.'
Correct: C
'Data' is technically plural but treated as singular in modern usage, so the correct verb is 'suggests.' However, 'there is' is singular, which is incorrect because 'variability' is singular. The correct phrase 'suggests that there is' combines standard subject-verb agreement.