Answer :
The suitable method to determine the age of the surface of terrestrial planets is the crater counting. Because, as the age of the planet increases, its crater count also increases.
What is crater counting?
Crater counting a proper method to estimate the age of a planet's surface. Based on this method an assumption is made that the a piece of new planetary surface doesn't have impact craters.
The rate of accumulation of impact craters increases with the age of the planetary surface. Counting the number craters per given area helps to determine how long they have created there and thus, how long the surface has formed.
Dating of samples with radioactive isotopes is used find the age of rocks. Similarly measuring atmospheric thickness and color analysis does not give an idea about the age of the surface of planets. Hence, option c is correct.
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