A customer contacts you for assistance. How should you say to greet the customer?

A."Thank you for contacting Intuit. My name is
-, your Intuit Expert of 5 years, here to help you today with whatever you
need."
B."You've reachedan expert at Intuit. What issue may I resolve for you today?"
C."Thank you for contacting TurboTax. My name is - about
and I'm a Tax Expert with 5 years of experience. I see your calling
D."Thanks for contacting us. My name is. How can I help you today?"

D. "Thanks for contacting us. My name is. How can I help you today?"