According to the text, what is the principle that guarantees that the penalty imposed on a criminal will only be applied to the criminal himself? ...

According to the text, what is the principle that guarantees that the penalty imposed on a criminal will only be applied to the criminal himself?

The principle of personality of the penalty.
a) The principle of collective guilt.
b) The principle of individual responsibility.
c) The principle of proportionality.
d) The principle of legality.