3. Was sugar a necessary commodity in the early 19 century?

1710 – 1770 CE. Sugar became an extremely popular commodity,

By 1750, sugar surpassed grain as "the most valuable commodity in European trade — it made up a fifth of all European imports and in the last decades of the century four-fifths of the sugar came from the British and French colonies in the West Indies." From the 1740s until the 1820s, sugar was Britain's most valuable ...

where is the scientific experiment?

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: