The executive's glowing report on the struggling project was met with considerable skepticism, as everyone knew his praise was merely _____ to mask the team's perfunctory efforts.

✓ Correct Answer: Option B

A 'glowing report on a struggling project' met with 'skepticism' and intended 'to mask perfunctory efforts' implies insincere praise. 'Disingenuous' means not candid or sincere, often pretending innocence.