Visible and infrared photographs of a middle latitude storm are shown below.  At A the clouds are white on the visible photograph and grey on the IR photograph.  At B the clouds are white on both the visible and the IR photographs.  At C the cloud is white on the IR photograph and grey on the visible picture.  Based on these satellite observations, use an A, B, or C to indicate where the following types of clouds are found in the storm.

thunderstorm (Cb) clouds________       thin, high altitude, Cs clouds________       thick, low altitude St clouds________

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