The passage concludes that Banks in Inverness have two sets of locking doors. It may be the case that banks in Inverness experience more robbery attempts than do those in La Rinconada, and have thus adopted the extra doors as a security measure.

For weakening the argument, we will need to show that the two sets locking door serve different purpose but not for saving the bank from robbery.

(A) Last year the number of bank robberies in La Rinconada was almost one-half greater than the corresponding figure for the previous year. - No of bank robberies in La Rinaconda - irrelevant to the argument

(B) Inverness is known for its harsh winters, while the climate of La Rinconada is quite temperate year-round. - Yes. To be safe from cold winds the doors are set. - Hold on to it.

(C) The mechanism of the double doors used by banks in Inverness allows bank security personnel to lock the doors remotely. - Does not affect the conclusion at all.

(D) Bank robbery attempts are typically unsuccessful, and, even when the robbers do manage to escape with stolen money, the sum is usually quite small. - Out of scope . We do not need the details of robbery

(E) Inverness has almost twice as many police officers per capita as does La Rinconada. - More no of police officers does not explain why two sets of locking door.

Answer B