Which of the following are coniferous evergreen plants? 

A)  algae 
B)  bacteria 
C)  maples and oaks 
D)  pines and cedars

Coniferous evergreen plants refer to trees that produce cones and have needle-like leaves that stay green year-round. Pines and cedars are examples of coniferous evergreen plants. Algae and bacteria are not plants, and maples and oaks are deciduous trees that lose their leaves seasonally.