Right to be informed of the charges

Which principle, essential for a fair legal process, is being violated?

Lina is arrested in a foreign country while on vacation. The authorities there accuse her of espionage, but they refuse to specify the exact details of the charges or provide any evidence. Lina is unfamiliar with the legal system of this foreign country and is concerned about her rights.

Choices: 

A) The right to legal representation

B) The right to a speedy trial

C) The right to be informed of the charges

D) The right to remain silent