For an Experiment Comparing More Than Two Treatment Conditions, Why

For an experiment comparing more than two treatment conditions, why should you use analysis of variance rather than separate t tests?

A) Separate t tests would require substantially more computations.
B) A test based on variances is more sensitive than a test based on means.
C) Conducting several t tests would inflate the risk of a Type I error.
D) There is no difference between the two tests, you can use either one.

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