Which of the following are deciduous trees?

Abies concolor
Acer rubrum
Acer saccharinum
Cornus florida
Gleditsia triacanthos
Picea glauca
picea pungens
Picea abies
Pinus strobus
Quercus rubra 
 Of the species listed, Acer rubrum, Acer saccharinum, Gleditsia triacanthos, Quercus rubra, and Cornus florida are deciduous trees.