The answer is: D. Scientific claims are strengthened by evaluating different possible arguments.
Argument is a series of statements used to persuade someone of something or to present reasons for accepting a conclusion (in this example, Canary Islands were not formed by volcanic activity and the fault was active at that time).
Evaluate means to judge or calculate the quality, importance, amount or value of something, it this example two different arguments about Canary Islands formation,
The Canary Islands (seven major islands, one minor island) were originally volcanic islands, formed by the Canary hotspot.
