Officials in Gladewater are working to figure out the cause behind elevated levels of lead in the city's drinking water. On Monday, the city sent out a notice advising residents that water tested from June to September had higher than usual levels of lead. Levels that were not a violation under fed

Based on that paragraph can we conclude that this sentence is true?
On Monday, a notice was sent to every single resident of the city. 

Pick your answer from:
a). Yes;
b). It's impossible to say;
c). No;
b).