Top House Democrats, anxiously awaiting the findings of the special counsel, Robert S. Mueller III,
insists on Sunday that their own investigations must go on regardless of if the Justice Department accuses President in wrongdoing.a) insists on Sunday that their own investigations must go on regardless of if the Justice Department accuses President in wrongdoing
b) insisted on Sunday that their own investigations must go on regardless of whether the Justice Department accuses President of wrongdoing.
c) insists on Sunday that their own investigations must go on regardless of if the Justice Department accused President in wrongdoing
d) insisted on Sunday that their own investigations must go on regardless of whether the Justice Department accused President in wrongdoing.
e) insists on Sunday which their own investigations must go on regardless of if the Justice Department accuses President in wrongdoing
Source: One of the GMAT Tutions from India