在碱性溶液中能大量共存且溶液为无色透明的离子组是[ ]

A．K⁺ 、MnO₄^－、Na⁺、Cl^－

B．K⁺、Na⁺、NO₃^－、CO₃^2－

C．Na⁺、H⁺、NO₃^－、SO₄^2－

D．Fe³⁺、Na⁺、Cl^－、SO₄^2－

You have coughed for several days, Bill. Stop smoking, _____ you'll get better soon. [ ]

A. but

B. after

C. or

D. and