The test that will most likely be prescribed is an Ultrasound Examination.
The geometric method gives scientists the spreading direction to go with the spreading speed
I do believe Marsupials originally came from South America but was once thought to originate from Australia.
If i remember correctly, it should be D. A specific amino acid.
Codons make Amino Acids,
Amino Acids make Proteins,
and those Proteins are used for the specific job it was made for.
Hope this helps! :)