In a Pond, Tadpoles Eat Algae and Fish Eat the Tadpoles

In a pond, tadpoles eat algae and fish eat the tadpoles. Around the pond, grasshoppers eat grass and, at night, are preyed upon by bats. Other bats eat the fish that eat the tadpoles. In this community, the algae are:

A) primary producers.
B) primary consumers.
C) secondary consumers.
D) tertiary consumers.
E) detritivores.