Nobody invited me to the party. into passive voice​

party is not invited by some spagetti and burritos with mustard

I wasn't invited to the party by anyone. (into passive voice)

if we are changing from active to passive the main thing we have to add is "By" in the sentence

d. therefore pilots wisely train these cubs by various strategic tricks to look danger in the face a little more calmly.

c or d they are the same