下列哪项是妊娠合并心脏病孕产妇最危险的时期( )

A．妊娠32～34周、分娩期及产后3天

B．妊娠12～14周、分娩期及产后7天

C．妊娠15～17周、分娩期及产后10天

D．妊娠20～22周、分娩期及产后15天

E．妊娠24～26周、分娩期及产后28天

In relation to the Companies Act 1965:

(b) Explain the procedure for the variation of class rights as provided for under Table A of the Fourth Schedule as well as the protection afforded to a shareholder who had objected to such a variation. (5 marks)