Active voice: In most English sentences with an action verb, the subject performs the action denoted by the verb.
Ponyboy says "Darry... I'm sorry"
And Darry replies "Oh Pony.. I'd thought we'd lost you... Like we did mom and dad."
What he says in the line in question is basically translated in option "A" I believe. :)
When he received the test back with a 27 out of 100, he knew he had bungled the questions.
"Bungle" means to carry out something unsuccessfully, leading to a failure. Since the boy in the above sentence received a low test score, he knew he failed in answering the questions correctly.