All of the above I’m pretty sure
Part of a sentence that contains a verb and says something about the topic
The answer is Chronologically because the author is giving on the beginning the timeline that narrates everything about Gertrude Belle Elion.
Hope this helped you
<em>Tobey</em>
It seems that you didn't include the whole excerpt, given that the last sentence abruptly stops in the middle. However, the <span>phrases in this excerpt from Robert Stawell Ball's Great Astronomers that convey a commendable tone toward Ptolemy’s work are found in the last (incomplete) sentence: </span><span><u>Ptolemy is, without doubt, the greatest figure in ancient astronomy. </u>
Commendable means praise-worthy. </span>