For Extinct Taxa

Multiple Choice

For extinct taxa

A) the fossil record is the primary source of data for constructing phylogenetic trees.
B) one would expect allied extant taxa from the same location to be very different.
C) it makes sense to use an ad hoc explanation of how natural selection produced changes in a lineage, even when it is uncertain how the biotic and abiotic environment changed over time.
D) A and C
E) B and D