关于某溶液中所含离子的鉴别，下列判断正确的是

A．加入BaCl₂溶液，生成白色沉淀，加稀硝酸沉淀不消失，则原溶液中一定含有SO₄^2－

B．加盐酸生成的气体能使澄清石灰水变浑浊，则原溶液中一定含有CO₃^2－

C．用洁净的铂丝蘸取溶液在火焰上灼烧，产生黄色的火焰，则原溶液中一定不含有K⁺

D．加入NaOH溶液，生成的白色沉淀在空气中迅速变为灰绿色，最终变为红褐色，则原溶液中一定含有Fe²⁺

It was in the school ________ he studied ten years ago ________ he got his first prize in public

speaking.  [      ]

A. that; where  

B. where; that     

C. where; where    

D. that; that