Which statement about speed is true?

The ideal maximum speed limit on most California highways is 70 mph, unless otherwise posted.
There are situations where you should reduce your speed, even if no specific speed limit sign is posted.
You may never drive faster than the posted minimum speed limit.
You shouldn't adapt your speed to the speed of other vehicles on the road.
Explanation

Even if the posted speed limit allows higher speeds, you are required by law to adjust your speed based on current conditions. This is known as the Basic Speed Law. It means you must drive more slowly in situations such as rain, fog, heavy traffic, near road work, or when visibility is limited. Speed limit signs indicate the maximum legal speed-not necessarily the safest speed at all times. Unless otherwise posted, the maximum speed limit on most California highways is 65 mph. You must always drive at a speed that is safe for the current road, weather, and traffic conditions, even if that means driving below the posted limit.

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