The central dogma involves conversion of DNA to protein. The DNA either undergoes transcription to form RNA or replication to form a new DNA. When transcription occurs, RNA is formed which can then be translated into protein. Consider the illustration below
DNA ⇒ RNA ⇒ Protein
There are three types of RNA
tRNA → transfer RNA
rRNA → ribosomal RNA
mRNA → messenger RNA
Of these three RNAs, the mRNA is the one translated into protein with the aid of the remaining two.
From the above, it can be deduced that DNA cannot be directly converted into protein.
i think it is D, she has already constructed the hypothesis and needs is performing the experiment. there is not much of an observation stage because she is looking at a distant end result in a set time frame.