Final Answer:
The severity of the interference with individual liberties is not considered a factor in the balancing test for constitutionality in sobriety checkpoints, unlike the gravity of public concerns and the degree to which the seizure advances public interest. The correct answer is c) the severity of the interference with the individual liberties.
Step-by-step explanation:
Sobriety checkpoints involve a balancing test for constitutionality, considering three factors. The severity of the interference with individual liberties is not one of these factors.
The factors include (a) the gravity of the public concerns served by the seizure, and (b) the degree to which the seizure advances the public interest. The balancing test aims to weigh the government's interest in maintaining public safety against the intrusion into individual privacy.
The correct answer is c) the severity of the interference with the individual liberties.