I’m 78% sure it’s C. Sorry if I’m wrong
The current, and 23rd, Prime Minister of Canada is the Liberal Party's Justin Trudeau, who was appointed on November 4, 2015, by Governor General David Johnston, following the general election that took place that year.
Answer:
The radioactive isotope content of a rock can be used to identify the rocks age.
Because sunlight does not reach all the way to the bottom of the lake :)
