Questão
ID 725863Disciplina: Língua Inglesa
Assunto: Non-defining Relative Clauses
Ano: 2009 Banca: NCE - Núcleo de Computação Eletrônica UFRJ Órgão: Instituto Nacional da Propriedade Industrial

Read the sentence below.
“Since the patrols began, the city has issued eight citations for the flouting of the median law — the fine is \$158 — and has given warnings, which are generally heeded, to about 600 people a month.”
The pronoun “which” refers to: