下列离子方程式中，书写正确的是[     ]

A. 新制氯水跟溴化钾溶液反应：

B. 碳酸钙跟稀盐酸反应：

C. 稀硫酸跟氢氧化钡溶液反应：

D. 向澄清的石灰水中通入少量CO₂：

Clinical evidence began to ______ suggesting that the new drugs had a wider range of useful effect than had been predicted from experiments in animals.

A．operate.

B．strengthen

C．accumulate

D．approve