听下面一段较长对话，回答以下小题。
【小题1】What's the brand of the speaker’s car?

A．Delphi.

B．Google.

C．Tesla.

【小题2】How does the man feel about the letter at first?

A．Excited.

B．Worried.

C．Unconcerned.

【小题3】What will happen later this year?

A．Tesla will test its self-driving cars.

B．Delphi will make a self-driving car.

C．Google will create a new software.

【小题4】What will the Tesla Company do with its sold cars?

A．Replace the wheels.

B．Update the software.

C．Fix the engines.