Answer:
deception
Explanation:
it was his key ️ to their minds and heart<em><u> </u></em><em><u>but </u></em><em><u>they </u></em> did not know
D: to stop smoking
So you can cross out a and b already because it starts with caps which wouldn’t make sense which leave you with c and d so you could narrow it down to which on would make sense in a complete sentence which is D.
D because propel means to move forward
