In each of the questions four different ways of presenting an idea are provided.Choose the one that conforms closely to standard English usage.

Pollution and degradation of the environment is, according to the commission's report, a matter of universal concer.

Pollution and degradation of the environment is, according to the report by the commission, a matter of universal concern.

Pollution and degradation of the environment are, according to report of the commission, matters of universal concer.

Pollution and degradation of the environment are, according to the commission's report, a matter of universal concern.