Which of the following sentences has a gerund acting as a direct object? A. He received a warning from the principal.
B. Bicycling across the state of Washington was fun.
C. Recent findings have raised serious doubts about his research.

my best guess would be: d allusion

makes the most sense

in our power to make a world happy - to teach mankind the art of being so - to a character hitherto unknown - and to have, as it were, a new creation intrusted to our hands, are honors that command reflection, and can neither be too highly estimated,

i think it is c. good luck!