DrFord Wants to Test the Hypothesis That Room Color Can

 Dr.Ford wants to test the hypothesis that room color can affect memory.To that end,he randomly assigns 10 students to a condition where they study a written passage while seated in a room that is painted a lilac color.The other 10 students study the passage while seated in an identical room that is painted bright orange.After both groups studied the passage for one hour,they are given a multiple-choice test over the material.Dr.Ford then calculates how many questions the students answer correctly.He finds that students in the lilac-room condition score much better than the students in the orange-room condition.Based on this study,what can Dr.Ford conclude? 

A) Room color predicts, but does not cause a change in, memory performance.
B) Room color causes a change in memory performance.
C) Students like cool colors better than warm ones.
D) Warm colors make students angry.