甲袋中有3个红球1个白球，乙袋中有1个红球2个白球，从两袋中分别取出一个球，则两个球颜色相同的概率是（）.

• A.<img src="http://timg.fentiku.com/javaimportItems/e01c6f3ea2cc4e7daa7f73d03fef654d/images/1598e.png"><br/>
• B.<img src="http://timg.fentiku.com/javaimportItems/e01c6f3ea2cc4e7daa7f73d03fef654d/images/15be2.png"><br/>
• C.<img src="http://timg.fentiku.com/javaimportItems/e01c6f3ea2cc4e7daa7f73d03fef654d/images/15e1e.png"><br/>
• D.<img src="http://timg.fentiku.com/javaimportItems/e01c6f3ea2cc4e7daa7f73d03fef654d/images/16046.png"><br/>

正确答案：D