Fact 1: The color of leaves on deciduous trees usually changes in the autumn season. Fact 2: Douglas Fir trees have fir cones. Given the two facts above, what non-deciduos types do not change colors?

Pick your answer from:
[a]. Conifers;
[b]. Frogs;
[c]. eukyarotes;
[d]. Echinoids;
[e]. monotremes;
[f]. opossums;
[g]. ferns;
[h]. heterotrophs;
Answer:
[a].