The only representatives of the people of these colonies are persons chosen therein by themselves; and that no taxes ever have been, or can be constitutionally imposed on them but by their respective legislatures.”

-statement by the stamp act congress, 1765

source: library of congress

what is a valid conclusion that can be drawn from this quotation?

the colonial legislatures should be appointed by the english king with the consent of parliament.
the english king should have the right to tax the colonists.
only the colonists’ elected representatives should have the power to levy taxes.
the colonists should be opposed to all taxation

Based on the quotation, the only valid conclusion that can be drawn its C. Only the colonists' elected representatives should have the power to levy taxes.

As it is implied in the statement by the Stamp Act, it was considered that representatives of the colonies should be elected by colonists themselves.  And at the time, the King considered it was in his right to raise money from the colonies to finance the French and Indian Wars, but there was no representation of the colonies in Parliament. Thus, it was considered unconstitutional for Britain to levy taxes on the colonies.

United States Senate. The amendment made us able to vote for senators.