In mammalian development,which of the following is the correct chronological order of events?

A)blastocyst,zygote,four-cell,compacted morula,
B)zygote,four-cell,compacted morula,blastocyst
C)compacted morula,blastocyst,zygote,four-cell
D)four-cell,compacted morula,blastocyst,zygote