Answer:
Just as he finished his presentation, the LCD projector shorted out.
Even though his conference badge said "Pete," the man introduced himself as Yoni.
Step-by-step explanation:
In grammar, there are some basic punctuations that are needed when using introductory elements.
One of the rules states that there should be a comma after an independent/dependent clause and before the beginning of an independent clause.
The two options that satisfy this rule are the options above.