下列物质中，既能发生酯化反应，又能发生加成反应的是（ ）
A <img src="https://www.beizhujiaoyu.com/uploads/202208/2012092814277238723jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/2012092814275995599jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/2012092814273645364jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/2012092814278768876jpg" alt="" border="0" />
