Answer:
20th Century: made
Step-by-step explanation:
"....., but when those muscles and joints were rendered capable of motion.." The word in italics can be replaced by made. This means that when Frankestein was being created, Victor Frankenstein wanted the monster's muscles and joints to move. The surprising point was, yet, that Frankenstein's own creator got shocked when the monster moved. This is the reason why this phenomenon was compared to Dante's imaginary reaction.