When you are meeting your coworkers. Normally, HR manager or head of office will introduce and welcome you. Which of the following introduction speech is not appropriate?

A、Luckily the weather has aligned with our wishes. The sun and I bid you a warm welcome.
B、It’s my pleasure to extend a cheerful welcome to you all!
C、Hello, how are you doing today？
D、On behalf of my colleagues, I wish you all a convivial welcome.
喵查答案：Hello, how are you doing today？