As others have said, B. is the answer to question.
But to add to that, the U.S. has 4 timezones[1]: Eastern Time, Central Time, Mountain Time, and Pacific Time. Each zone has a "Standard" time and "Daylight" time - that is, for the winter half of the year, California is in the Pacific Standard Time (PST), whereas in the summer (B., in your question), California is in the Pacific Daylight Time (PDT). It's a very petty pet peeve of mine when people confuse they two - when they say "Let's meet at 3pm, PST" to mean 3pm Pacific Time, but it's in the summer ~ so 3pm PST would really be 2PM PDT. I know, I know, it's petty... and normally I don't say anything and roll with it... but on the inside I weep.
[1] Note: 4 Timezones isn't exactly correct. There is Hawaii and Alaska of course, and the U.S. Island Territories too. And then there's Arizona, which is permanently on Mountain Standard Time (MST), so when the rest of the Mountain Zone jump ahead an hour to be in MDT, Arizona is still MST, which is the same "time" as PDT ~ is that a different timezone? Oh... and only most or Arizona avoids MDT - most (but not all) of the Native American Reservations in Arizona do observe MDT. WHY HAVE WE DONE THIS TO OURSELVES?!? ¯\_(ツ)_/¯