Which of the sentences below best expresses the essential information in the highlighted s

entence in the passage？ Incorrect choices change the meaning in important ways or leave out essential information.

A．Thanks to the public outreach programs initiated by marine organizations, new algae growth has slowed in recent years.

B．For now, all that can be done is to prevent the establishment of new algae colonies and raise awareness about the threat.

C．Anyone who encounters the algae in the wild should exercise extreme caution and report the sighting to the authorities immediately.

D．Unfortunately, independent scientists and research organizations have so far been unable to find a solution to the problem of the invasive algae.